我有两个数据集（下面），我想作为一个单一的时间序列进行组合，以在R中进行一些多元分析，但是它们具有不同的频率。第一个每3000年测量一次，另一个每1000年测量一次。我的猜测是，我必须对第二个系列进行欠采样才能使其与第一个系列保持一致。但是，我不确定如何在R中执行此操作，我发现的唯一示例都是带有真实日期（天，周，月）。
Age(Myr) d18O(‰) 0 3.43 0.003 3.37 0.006 3.54 0.009 3.87 0.012 4.36 0.015 4.9 0.018 5.01 0.021 4.96 0.024 4.87 0.027 4.67 0.03 4.58 0.033 4.61 0.036 4.57 0.039 4.49 0.042 4.58 0.045 4.57 0.048 4.57 0.051 4.48 0.054 4.45 0.057 4.42 0.06 4.47 0.063 4.61 0.066 4.6 0.069 4.5 0.072 4.34 0.075 4.26 0.078 4.11 0.081 4.02 0.084 4.13 0.087 4.32 0.09 4.32 0.093 4.21 0.096 4.1 0.099 4.09 0.102 4.05 0.105 4.19 0.108 4.29 0.111 4.04 0.114 3.73 0.117 3.42 0.12 3.29 0.123 3.35 0.126 3.78 0.129 4.35 0.132 4.48 0.135 4.76 0.138 4.88 0.141 4.91 0.144 4.86 0.147 4.81 0.15 4.91 0.153 4.83 0.156 4.68 0.159 4.71 0.162 4.64 0.165 4.47 0.168 4.43 0.171 4.54 0.174 4.61 0.177 4.54 0.18 4.62 0.183 4.65 0.186 4.61 0.189 4.38 0.192 4.11 0.195 3.96 0.198 3.86 0.201 4.07 0.204 3.95 0.207 3.84 0.21 3.79 0.213 3.75 0.216 3.82 0.219 3.99 0.222 4.19 0.225 4.58 0.228 4.57 0.231 4.43 0.234 4.04 0.237 3.75 0.24 3.93 0.243 4.42 0.246 4.74 0.249 4.8 0.252 4.72 0.255 4.71 0.258 4.68 0.261 4.71 0.264 4.71 0.267 4.73 0.27 4.69 0.273 4.53 0.276 4.54 0.279 4.33 0.282 4.08 0.285 3.99 0.288 4 0.291 4.18 0.294 4.35 0.297 4.37 0.3 4.28 0.303 4.3 0.306 4.23 0.309 4.27 0.312 4.17 0.315 3.88 0.318 3.98 0.321 3.73 0.324 3.61 0.327 3.43 0.33 3.59 0.333 3.71 0.336 4.25 0.339 4.72 0.342 5.17 0.345 5.14 0.348 5.04 0.351 4.76 0.354 4.8 0.357 4.87 0.36 4.81 0.363 4.77 0.366 4.64 0.369 4.58 0.372 4.62 0.375 4.45 0.378 4.51 0.381 4.44 0.384 4.13 0.387 4.29 0.39 4.21 0.393 3.89 0.396 3.84 0.399 3.63 0.402 3.51 0.405 3.59 0.408 4.07 0.411 4.54 0.414 4.88 0.426 4.56 0.429 4.59 0.432 4.62 0.435 4.66 0.438 4.68 0.441 4.64 0.444 4.64 0.447 4.42 0.45 4.56 0.453 4.61 0.456 4.5 0.459 4.49 0.462 4.44 0.465 4.4 0.468 4.29 0.471 4.1 0.474 3.95 0.477 3.84 0.48 3.85 0.483 3.87 0.486 4.09 0.489 4.23 0.492 4.25 0.495 4.15 0.498 3.98 0.501 4.06 0.504 4.33 0.507 4.64 0.51 4.42 0.513 4.41 0.516 4.31 0.519 4.31 0.522 4.32 0.525 4.45 0.528 4.5 0.531 4.62 0.543 4.53 0.546 4.27 0.549 4.23 0.552 4.01 0.555 3.94 0.558 3.77 0.561 3.73 0.564 3.69 0.567 3.58 0.57 3.62 0.573 3.67 0.576 3.91 0.579 4.05 0.582 4.09 0.585 4.17 0.597 4.1 0.6 4.19 0.603 4.04 0.606 4.14 0.609 3.92 0.612 3.74 0.615 3.78 0.618 3.88 0.621 4.38 0.624 4.64 0.627 5 0.63 5.09 0.633 4.82 0.636 4.92 0.639 5.02 0.642 4.96 0.645 4.84 0.648 4.88 0.651 4.9 0.654 4.81 0.657 4.78 0.66 4.77 0.663 4.7 0.666 4.7 0.669 4.81 0.672 4.51 0.675 4.55 0.678 4.5 0.681 4.44 0.684 4.21 0.687 4 0.69 3.81 0.693 3.94 0.696 4.01 0.699 4.15 0.702 4.28 0.705 4.28 0.708 4.27 0.711 4.38 0.714 4.61 0.717 4.77 0.72 4.9 0.723 4.79 0.726 4.46 0.729 4.33 0.732 4.28 0.735 4.38 0.741 4.37 0.744 4.37 0.747 4.57 0.75 4.73 0.753 4.72 0.756 4.66 0.759 4.64 0.762 4.48 0.765 4.4 0.768 4.52 0.771 4.42 0.774 4.07 0.777 3.86 0.78 3.72 0.783 3.73 0.786 3.89 0.789 4.29 0.792 4.6 0.795 4.69 0.798 4.68 0.801 4.67 0.804 4.57 0.807 4.21 0.81 4.06 0.813 3.97 0.816 4.09 0.819 4.08 0.822 4.15 0.825 4.07 0.828 4.06 0.831 4.11 0.834 4.04 0.837 3.9 0.84 3.86 0.843 3.81 0.846 3.78 0.849 3.93 0.852 3.83 0.855 3.66 0.858 3.77 0.861 3.82 0.864 3.99 0.867 4.41 0.87 4.66 0.873 5.01 0.876 5.01 0.879 4.96 0.882 4.81 0.885 4.75 0.888 4.75 0.891 4.74 0.894 4.69 0.897 4.49 0.9 4.35 0.903 4.17 0.906 4.17 0.909 4.28 0.912 4.46 0.915 4.58 0.918 4.51 0.921 4.39 0.924 4.26 0.927 4.24 0.93 4.19 0.933 4.18 0.936 4.02 0.939 3.83 0.942 3.74 0.945 3.63 0.948 3.43 0.951 3.47 0.954 3.58 0.957 3.71 0.96 4.22 0.963 4.52 0.966 4.44 0.969 4.24 0.972 4.2 0.975 4.09 0.978 4.12 0.981 4.17 0.984 4.06 0.987 4.18 0.99 4.14 0.993 4.05 0.996 3.88 0.999 4.24 1.002 4.25 1.005 4.13 1.008 4.28 1.011 4.17 1.014 4.01 1.017 3.94 1.02 4 1.023 3.86 1.026 3.9 1.029 3.99 1.032 4.09 1.035 4.37 1.038 4.55 1.041 4.52 1.044 4.42 1.047 4.27 1.05 4.29 1.053 4.36 1.056 4.37 1.059 4.29 1.062 3.74 1.065 3.53 1.068 3.45 1.071 3.44 1.074 3.55 1.077 3.73 1.08 3.92 1.083 4.05 1.086 4.11 1.089 4.19 1.092 4.17 1.095 4.24 1.098 4.37 1.101 4.24 1.104 4.05 1.107 3.88 1.11 3.8 1.113 3.85 1.116 4.22 1.119 4.41 1.122 4.4 1.125 4.51 1.128 4.63 1.131 4.63 1.134 4.61 1.137 4.39 1.14 4.27 1.143 4.12 1.146 4.09 1.149 3.99 1.152 3.96 1.155 3.94 1.158 3.79 1.161 3.77 1.164 3.73 1.167 3.81 1.17 3.86 1.173 3.87 1.176 3.75 1.179 3.6 1.182 3.74 1.185 3.99 1.188 4 1.191 4.26 1.194 4.4 1.197 4.5 1.2 4.42 1.203 4.45 1.206 4.46 1.209 4.35 1.212 4.27 1.215 4.23 1.218 4.16 1.221 3.97 1.224 3.74 1.227 3.57 1.23 3.57 1.233 3.51 1.236 3.44 1.239 3.38 1.242 3.3 1.245 3.86 1.248 4.22 1.251 4.33 1.254 4 1.257 4.23 1.26 4.25 1.263 4.07 1.266 3.96 1.269 3.94 1.272 3.83 1.275 3.71 1.278 3.62 1.281 3.87 1.284 4 1.287 4.35 1.29 4.33 1.293 4.28 1.296 4.34 1.299 4.27 1.302 4.27 1.305 4.25 1.308 4.04 1.311 3.9 1.314 3.78 1.317 3.97 1.32 4.1 1.323 4.21 1.326 4.26 1.329 4.3 1.332 4.34 1.335 4.28 1.338 4.16 1.341 3.84 1.344 3.56 1.347 3.57 1.35 3.6 1.353 3.59 1.356 4.03 1.359 4.12 1.362 4.29 1.365 4.36 1.368 4.34 1.371 4.28 1.377 4.11 1.38 4.12 1.383 3.86 1.386 3.79 1.389 3.77 1.392 3.72 1.395 3.56 1.398 3.53 1.401 3.66 1.404 3.79 1.407 3.78 1.41 3.78 1.413 4.15 1.416 4.33 1.419 4.17 1.422 4.2 1.425 4.1 1.428 4 1.431 3.9 1.434 3.65 1.437 3.43 1.44 3.31 1.443 3.38 1.446 3.41 1.449 3.46 1.452 3.47 1.455 3.81 1.458 4.26 1.461 4.18 1.464 4.27 1.467 4.06 1.47 3.6 1.473 3.47 1.476 3.52 1.479 3.52 1.482 3.54 1.485 3.54 1.488 3.39 1.491 3.47 1.494 3.67 1.497 3.96 1.5 4.21Age(kyr), CO2 1,280 2,280 3,280 4,280 5,280 6,280 7,280 8,280 9,280 10,225.71 11,219.83 12,212.34 13,206.54 14,202.52 15,202.21 16,202.03 17,205.4 18,209.92 19,217.96 20,221.98 21,225.21 22,228.5 23,227.43 24,223.21 25,221.94 26,217.75 27,215.51 28,210.01 29,206.75 30,204.59 31,202.46 32,201.57 33,200.88 34,201.35 35,202.55 36,203.03 37,202.54 38,200.78 39,198.35 40,196.5 41,193.98 42,194.26 43,194.7 44,193.78 45,193.96 46,191.86 47,189.54 48,187.15 49,185.43 50,184.45 51,183.4 52,184.66 53,184.98 54,185.64 55,187.2 56,190.86 57,195.2 58,200.28 59,205.03 60,208.91 61,212.9 62,216.62 63,218.44 64,218.77 65,219.97 66,219.65 67,219.83 68,215.76 69,217.32 70,215.47 71,215.87 72,214.88 73,212.65 74,208.75 75,206 76,203.34 77,201.13 78,201.17 79,204.24 80,209.39 81,214.28 82,218.72 83,220.87 84,221.74 85,223.57 86,228.59 87,233.56 88,240.86 89,245.91 90,250.98 91,254.51 92,257.94 93,259.65 94,258.67 95,254.51 96,248.24 97,241.7 98,234.63 99,228.92 100,227.41 101,225.74 102,226.99 103,227.66 104,227.95 105,227.03 106,226.01 107,225.83 108,223.82 109,224.14 110,222.58 111,224.65 112,227.22 113,229.59 114,232.23 115,235.05 116,238.24 117,239 118,239.21 119,238.06 120,238.42 121,237.7 122,233.47 123,234.63 124,233.31 125,227.85 126,219.42 127,213.92 128,210.08 129,206.35 130,203.42 131,199.46 132,201.75 133,202.7 134,203.53 135,207.66 136,207.23 137,208.64 138,207.25 139,207.43 140,202.9 141,200.87 142,194.13 143,190.47 144,185.28 145,180.68 146,177.77 147,176.53 148,175.38 149,177.06 150,180.23 151,182.96 152,186.75 153,189.16 154,188.13 155,186.18 156,183.7 157,180.45 158,177.12 159,176.41 160,172.67 161,169.54 162,164.93 163,162 164,160.45 165,160.19 166,160.39 167,161.22 168,161.3 169,160.02 170,159.57 171,161.83 172,165.86 173,173.47 174,175.36 175,184.68 176,189.65 177,192.83 178,207.94 179,222.57 180,232.06 181,240.85 182,244.22 183,243.09 184,243.02 185,241.23 186,237.45 187,233.95 188,231.64 189,229.09 190,227.19 191,226.32 192,226.62 193,226.41 194,225.12 195,222.03 196,223.91 197,228.68 198,235.23 199,239.62 200,244.77 201,244.09 202,238.6 203,231.57 204,225.09 205,219.5 206,215.63 207,214.16 208,213.5 209,213.11 210,212.42 211,211.63 212,211.2 213,210.87 214,213.95 215,214.11 216,212.8 217,210.13 218,206.93 219,202.38 220,202.04 221,201.11 222,208.38 223,220.91 224,232.61 225,241.48 226,249.99 227,254.46 228,253.2 229,248.91 230,243.08 231,237.79 232,232.74 233,229.91 234,230.09 235,231.58 236,231.62 237,230.91 238,228.9 239,227.85 240,222.8 241,217.91 242,210.84 243,205.06 244,201.36 245,201.38 246,206.15 247,212.18 248,212.46 249,211.86 250,209.15 251,203.28 252,201.21 253,199.85 254,199.36 255,195.74 256,192.44 257,189.64 258,187.45 259,187.21 260,189.48 261,194.51 262,198.09 263,201.44 264,205.37 265,209.57 266,213.83 267,214.75 268,215.36 269,216.51 270,216.94 271,215.59 272,215.86 273,215.67 274,214.75 275,211.67 276,208.4 277,206.49 278,201.52 279,198.15 280,198.64 281,198.86 282,201.49 283,203.24 284,205.43 285,204.15 286,201.22 287,200.06 288,198.81 289,197.58 290,197.19 291,199.17 292,202.11 293,207.71 294,216.23 295,227.72 296,240.58 297,253.02 298,262.48 299,269.37 300,274.77 301,277.14 302,275.44 303,269.44 304,263.5 305,259.21 306,256.52 307,255.4 308,258.57 309,263.68 310,267.31 311,270.22 312,273.03 313,276.09 314,275.63 315,273.5 316,271.82 317,271.29 318,267.49 319,267.29 320,267.58 321,266.77 322,265.9 323,263.96 324,260.65 325,257.82 326,254.58 327,248.32 328,244.37 329,239.77 330,237.89 331,233.58 332,229.35 333,224.38 334,217.35 335,212.03 336,207.62 337,203.66 338,203.55 339,211.87 340,219.63 341,224.85 342,228.93 343,231.16 344,235.34 345,239.97 346,241.45 347,239.79 348,235.67 349,229.69 350,221.53 351,216.83 352,215.2 353,214.84 354,214.53 355,211.92 356,209.05 357,207.68 358,206.63 359,204.73 360,203.38 361,202.81 362,202.01 363,200.23 364,199.07 365,197.89 366,196.59 367,193.88 368,194.36 369,194.98 370,197.37 371,201.46 372,206.42 373,211.4 374,217.11 375,223.39 376,229.04 377,234.08 378,237.56 379,241.48 380,245.65 381,249.44 382,253.48 383,256.83 384,260.44 385,265.67 386,273.22 387,280.05 388,284.03 389,284.85 390,284.76 391,284.08 392,282.89 393,284.81 394,288.43 395,293.17 396,295.58 397,299.4 398,303.16 399,306.63 400,306.27 401,306.39 402,304.6 403,300.71 404,294.76 405,288.23 406,283.95 407,280.94 408,278.55 409,276.54 410,274.84 411,272.87 412,270.47 413,267.01 414,263.48 415,257.87 416,250.18 417,242.75 418,235.58 419,229.49 420,222.96 421,220.18 422,217.6 423,211.82 424,211.8 425,209.1 426,203.22 427,196.44 428,194.1 429,194.47 430,193.8 431,195.92 432,196.35 433,197.1 434,197.87 435,199.43 436,200.53 437,200.09 438,198.45 439,195.89 440,191.47 441,186.75 442,183.43 443,178.92 444,179.19 445,182.34 446,183.71 447,185.14 448,187.77 449,189.1 450,188.54 451,191.02 452,193.46 453,195.69 454,195.05 455,194.75 456,192.69 457,190.17 458,187.61 459,187.15 460,187.36 461,188.26 462,191.47 463,193.92 464,197.72 465,201.81 466,205.51 467,207.76 468,211.97 469,214.9 470,217.04 471,216.59 472,216.25 473,213.8 474,210.92 475,209.41 476,208.61 477,209.9 478,210.24 479,210.15 480,211.01 481,216.01 482,220.74 483,227.05 484,235.69 485,243.68 486,253.95 487,265.5 488,277.49 489,285.82 490,286.32 491,281.74 492,273.18 493,263.12 494,254.27 495,249.2 496,244.42 497,242.8 498,239.96 499,238.28 500,236.26 501,235.73 502,234.97 503,234.97 504,237.22 505,236.34 506,237.35 507,243.88 508,248.43 509,258.98 510,270.61 511,278.85 512,282.61 513,284.15 514,283.89 515,282.6 516,277.6 517,272.46 518,264.52 519,256.51 520,247.22 521,238.65 522,233.65 523,225.96 524,219.74 525,213.71 526,210.22 527,207.2 528,206.22 529,207.04 530,206.95 531,206.29 532,205.03 533,202.8 534,199.56 535,197.82 536,197.46 537,200.99 538,204.31 539,210.72 540,217.87 541,225.14 542,229.26 543,231.64 544,231.47 545,229.87 546,226.53 547,222.65 548,218.8 549,215.59 550,211.69 551,208.75 552,206.78 553,205.39 554,202.51 555,201.24 556,200.82 557,199.59 558,198.92 559,199.18 560,199.49 561,199.16 562,199.33 563,199.77 564,200.35 565,198.73 566,195.42 567,194.51 568,192.58 569,191.39 570,195.4 571,198.09 572,201.62 573,207.8 574,212.89 575,215.82 576,220.53 577,225.38 578,226.14 579,226.41 580,226.78 581,226.72 582,223.31 583,220.8 584,217.81 585,218.95 586,220.77 587,223.34 588,224.45 589,224.05 590,223.41 591,223.8 592,223.86 593,224.36 594,224.93 595,227.56 596,226.39 597,224.4 598,224.83 599,230.13 600,234.62 601,247.09 602,260.04 603,276.59 604,291.53 605,293.89 606,292.29 607,288.76 608,285.12 609,278.65 610,269.43 611,258.84 612,245.5 613,231.62 614,221.37 615,211.33 616,202.51 617,194.77 618,188.49 619,182.11 620,174.15 621,174.85 622,171.43 623,166.95 624,171.67 625,172.77 626,175.77 627,182.39 628,189.87 629,194.72 630,195.02 631,195.83 632,196.04 633,194.41 634,191.86 635,189.89 636,187.53 637,183.41 638,179.32 639,176.28 640,173.52 641,172.5 642,173.03 643,174.38 644,174.22 645,172.68 646,171.82 647,171.63 648,171.32 649,171.5 650,172.65 651,174.54 652,177.88 653,183.09 654,190.25 655,197.72 656,204.04 657,207.04 658,205.34 659,201.68 660,195.37 661,191.95 662,186.55 663,184.23 664,182.44 665,180.19 666,176.98 667,174.41 668,173.28 669,171.44 670,171.09 671,171.79 672,172.06 673,172.61 674,174.11 675,176.8 676,179.88 677,183.09 678,186.17 679,188.25 680,189.48 681,190.68 682,194.3 683,191.29 684,193.26 685,195.29 686,197.67 687,201.12 688,207.74 689,213.12 690,218.57 691,223.52 692,228.32 693,234.17 694,242.9 695,253.9 696,266.24 697,277.91 698,286.4 699,283.01 700,276.36 701,268.73 702,259.53 703,249.35 704,238.32 705,228.56 706,220.61 707,213.78 708,209.3 709,206.76 710,204.82 711,204.06 712,203.37 713,202.68 714,204.54 715,209.8 716,213.18 717,216.96 718,219.31 719,222.22 720,225.99 721,227.42 722,228.21 723,228.36 724,228.58 725,227.68 726,223.71 727,215.42 728,210.06 729,206.11 730,203.16 731,201.06 732,199.24 733,198.38 734,198.2 735,198.74 736,199.86 737,202.35 738,205.4 739,208.42 740,211.05 741,210.05 742,206.31 743,200.07 744,194.67 745,191.01 746,191.04 747,192.91 748,197.27 749,203.66 750,213.31 751,220.63 752,224.21 753,227.63 754,230.79 755,234.63 756,239.26 757,243.8 758,247.06 759,250.57 760,251.45 761,248.63 762,245.87 763,245.42 764,245.39 765,244.99 766,247.66 767,252.47 768,256.57 769,259.75 770,263.34 771,267.22 772,269.95 773,271.16 774,271.35 775,270.24 776,267.81 777,264.75 778,260.77 779,255.36 780,249.98 781,244.56 782,239.91 783,235.38 784,230.48 785,229.83 786,227.82 787,224.1 788,220.45 789,219.03 790,219.59 791,222.25 792,223.99 793,225.7 794,224.69 795,223.29 796,223.89 797,225.69 798,223.89 799,221.51 800,218.87 801,217.18 802,216.36 803,215.97 804,216.33 805,217.48 806,218.28 807,220.01 808,222.2 809,223.7 810,224.85 811,223.45 812,225.44 813,226.47 814,228.42 815,231.7 816,233.56 817,233.39 818,234.09 819,235.35 820,236.33 821,237.65 822,240 823,241.89 824,243.34 825,245.54 826,247.8 827,249.4 828,251.23 829,252.71 830,253.47 831,253.8 832,255.22 833,258.16 834,260.09 835,259.44 836,255.83 837,250.39 838,245.31 839,243.13 840,244.82 841,249.71 842,257.6 843,268.2 844,279.27 845,288.37 846,295.56 847,297.8 848,296.35 849,291.3 850,283.49 851,275.48 852,265.87 853,257.91 854,252.18 855,247.66 856,243.06 857,238.43 858,232.37 859,225.11 860,218.1 861,212.89 862,209.95 863,205.91 864,205.35 865,204.17 866,199.45 867,205.83 868,211.21 869,214.01 870,213.39 871,208.65 872,207.47 873,205.14 874,203.68 875,202.53 876,202.81 877,199.07 878,193.44 879,190.08 880,187.99 881,188.3 882,190.64 883,194.64 884,198.39 885,203.45 886,211.56 887,218.52 888,225.25 889,229.47 890,233.02 891,231.34 892,230.09 893,226.63 894,222.36 895,217.64 896,215.26 897,207 898,202.66 899,198.41 900,195.53 901,192.89 902,191.75 903,192.16 904,192.47 905,193.87 906,196.28 907,198.91 908,201.85 909,203.57 910,204.82 911,206.72 912,209.01 913,212.43 914,216.6 915,220.86 916,225.17 917,230.42 918,237.12 919,238.16 920,237.88 921,238.7 922,240.38 923,240.92 924,241.35 925,241.65 926,240.25 927,238.46 928,235.91 929,233.82 930,229.61 931,224.79 932,220.9 933,217.41 934,215.23 935,215.22 936,216.28 937,216.85 938,218.36 939,220.59 940,223.39 941,223.2 942,225.25 943,225.96 944,224.69 945,222.62 946,220.61 947,218.37 948,217.61 949,218.01 950,218.03 951,216.61 952,217.29 953,216.21 954,215.12 955,212.56 956,209.09 957,205.27 958,204.29 959,201.36 960,202.74 961,202.74 962,206.11 963,208.8 964,211.66 965,215.06 966,219.31 967,223.2 968,223.79 969,221.21 970,217.48 971,211.89 972,209.65 973,206.28 974,204.3 975,204.53 976,205.73 977,207.8 978,210.72 979,213.94 980,217.59 981,220.38 982,220.88 983,218.55 984,214.49 985,207.78 986,206.15 987,204.3 988,202.62 989,201.49 990,200.93 991,201.79 992,202.89 993,204.4 994,206.62 995,209.19 996,211.85 997,213.71 998,215.5 999,216.77 1000,218.11 1001,220.22 1002,223.68 1003,230.71 1004,239.32 1005,252.69 1006,261.93 1007,267.37 1008,270.7 1009,270.55 1010,269.77 1011,269.53 1012,264.54 1013,262.8 1014,260.08 1015,257.38 1016,252.85 1017,246.98 1018,240.13 1019,235.29 1020,233.15 1021,231.35 1022,227.62 1023,225.45 1024,220.3 1025,214.5 1026,210.14 1027,207.2 1028,206.12 1029,206.63 1030,207.36 1031,208.2 1032,211.47 1033,218.83 1034,222.69 1035,222.41 1036,217.42 1037,216.77 1038,214.85 1039,213.2 1040,211.57 1041,208.03 1042,202.73 1043,193.7 1044,186.73 1045,179.71 1046,174.5 1047,171.18 1048,169.02 1049,167.1 1050,166.85 1051,172.08 1052,169.39 1053,177.13 1054,180.13 1055,182.36 1056,184.41 1057,186.71 1058,188.08 1059,187.94 1060,192.16 1061,198.42 1062,205.94 1063,214.74 1064,225.08 1065,235.02 1066,242.51 1067,248.1 1068,252.59 1069,256.41 1070,258.17 1071,257.63 1072,255.42 1073,252.87 1074,253.71 1075,259.24 1076,270.19 1077,287.19 1078,299.64 1079,302.68 1080,298.72 1081,293.74 1082,286.88 1083,277.85 1084,267.64 1085,257.82 1086,247.52 1087,237.29 1088,230.48 1089,226.2 1090,222.65 1091,224.38 1092,226.09 1093,230.61 1094,237.06 1095,245.14 1096,250.2 1097,252.75 1098,253.14 1099,250.87 1100,249.4 1101,249.29 1102,246 1103,240.81 1104,235.32 1105,229.34 1106,223.79 1107,218.34 1108,211.55 1109,205.14 1110,199.31 1111,192.65 1112,187.5 1113,184.83 1114,183.29 1115,183.57 1116,188.37 1117,197 1118,203.32 1119,204.21 1120,200.64 1121,197.08 1122,191.72 1123,185.21 1124,180.28 1125,177.08 1126,173.68 1127,169.87 1128,168.16 1129,168.52 1130,169.07 1131,168.46 1132,167.24 1133,165.2 1134,162.7 1135,160.87 1136,160.65 1137,161.04 1138,161.46 1139,162.32 1140,161.62 1141,161.47 1142,162.58 1143,164.85 1144,167.76 1145,173.44 1146,175.4 1147,176.32 1148,184.06 1149,187.78 1150,190.39 1151,196.41 1152,201.36 1153,204.57 1154,207.85 1155,211.75 1156,216.58 1157,222.16 1158,228.06 1159,233.41 1160,236.93 1161,238.67 1162,242.29 1163,242.65 1164,246.39 1165,252.84 1166,256.78 1167,265.29 1168,274.52 1169,284.88 1170,296.93 1171,306.27 1172,307.79 1173,304.14 1174,298.61 1175,292.23 1176,284.98 1177,277.58 1178,268.46 1179,257.47 1180,246.6 1181,239.29 1182,231.88 1183,225.52 1184,221.67 1185,221.05 1186,221.78 1187,221.67 1188,222.49 1189,225.3 1190,224.33 1191,220.72 1192,217.24 1193,214.86 1194,212.87 1195,210.07 1196,206.08 1197,201.96 1198,198.81 1199,198.37 1200,199.14 1201,201.35 1202,205.52 1203,210.46 1204,216.34 1205,220.32 1206,227.12 1207,234.83 1208,243.47 1209,252.36 1210,258.53 1211,264.11 1212,267.86 1213,272.1 1214,275.04 1215,277.13 1216,277.35 1217,273.17 1218,265.44 1219,255.9 1220,248.26 1221,242.78 1222,241.98 1223,244.04 1224,247.76 1225,252.2 1226,255.65 1227,258.59 1228,261.19 1229,262.18 1230,262.7 1231,262.05 1232,261.38 1233,258.63 1234,256.48 1235,254.56 1236,252.79 1237,252.32 1238,252.48 1239,252.95 1240,251.56 1241,250.57 1242,244.31 1243,238.99 1244,235.46 1245,234.15 1246,238.1 1247,245.52 1248,257.48 1249,266.29 1250,274.35 1251,277.55 1252,278.03 1253,276.63 1254,273.11 1255,268.2 1256,265.35 1257,255.41 1258,249.63 1259,243.05 1260,235.97 1261,232.88 1262,230.54 1263,229.78 1264,231.28 1265,232.33 1266,233.42 1267,231.05 1268,230.54 1269,229.86 1270,228.51 1271,226.2 1272,223.24 1273,221.07 1274,219.04 1275,218.39 1276,219.04 1277,220.88 1278,225.5 1279,226.94 1280,228.05 1281,230.91 1282,230.29 1283,229.71 1284,229.66 1285,229.16 1286,229.37 1287,231.58 1288,234.07 1289,243.69 1290,253.47 1291,262.74 1292,270.61 1293,276.41 1294,275.77 1295,270.93 1296,265.19 1297,258.61 1298,254.17 1299,251.29 1300,248.09 1301,245.81 1302,243.47 1303,240.85 1304,238.51 1305,236.61 1306,235.28 1307,234.7 1308,234.3 1309,233.61 1310,232.23 1311,229.76 1312,229.45 1313,227 1314,226.39 1315,228.01 1316,228.2 1317,227.06 1318,225.66 1319,225.45 1320,227.34 1321,232.21 1322,239.37 1323,244.96 1324,245.72 1325,243.63 1326,239.24 1327,233.61 1328,227.04 1329,220.45 1330,212.47 1331,200.92 1332,192.36 1333,185.29 1334,179.44 1335,175.47 1336,173.96 1337,174.56 1338,181.2 1339,182.63 1340,183.88 1341,185.8 1342,188.57 1343,191.47 1344,193.29 1345,194.18 1346,197.02 1347,199.41 1348,202.45 1349,206.14 1350,209.55 1351,212.26 1352,213.78 1353,215.74 1354,213.19 1355,210.83 1356,209.33 1357,208.78 1358,209.87 1359,214.66 1360,219.57 1361,226.01 1362,233.56 1363,237.44 1364,238.48 1365,235.09 1366,231.48 1367,229.55 1368,226.54 1369,223.39 1370,217.64 1371,215.59 1372,212.6 1373,211.36 1374,211.21 1375,211.98 1376,215.94 1377,218.94 1378,223.44 1379,229.79 1380,239.6 1381,251.85 1382,268.18 1383,286.74 1384,299.01 1385,305.62 1386,307.73 1387,304.02 1388,296.13 1389,285.98 1390,274.51 1391,261.22 1392,249.06 1393,240.91 1394,233.67 1395,228.61 1396,223.46 1397,221.14 1398,217.04 1399,212.96 1400,208.44 1401,203.92 1402,199.27 1403,193.76 1404,188.71 1405,184.58 1406,180.56 1407,176.6 1408,173.71 1409,171.72 1410,168.85 1411,167.43 1412,169.02 1413,173.85 1414,181.29 1415,190.26 1416,198.3 1417,204.62 1418,208.57 1419,212.01 1420,216.32 1421,221.63 1422,228.96 1423,236.04 1424,242.04 1425,247.22 1426,251.7 1427,255.17 1428,259.52 1429,265.03 1430,271.26 1431,277.2 1432,284.15 1433,292.71 1434,307.45 1435,321.36 1436,333.4 1437,337.75 1438,332.11 1439,321.33 1440,309.08 1441,295.88 1442,282.58 1443,269.55 1444,257.55 1445,247.57 1446,239.09 1447,232.3 1448,225.84 1449,217.86 1450,208.89 1451,202.34 1452,193.23 1453,182.53 1454,183.35 1455,181.78 1456,182.29 1457,185.11 1458,189.12 1459,192.07 1460,192.44 1461,194.59 1462,195.14 1463,196.37 1464,198.31 1465,201.56 1466,207.6 1467,216.16 1468,224.2 1469,231.16 1470,240.54 1471,245.92 1472,254.08 1473,263.57 1474,275.23 1475,285.99 1476,296.28 1477,300.34 1478,298.9 1479,294.44 1480,286.99 1481,278.98 1482,270.22 1483,262.84 1484,258.01 1485,254.28 1486,251.91 1487,250.36 1488,246.96 1489,242.32 1490,237.01 1491,233.41 1492,228.21 1493,223.31 1494,221.35 1495,224.11 1496,230.91 1497,240.99 1498,257.6 1499,267.59 1500,271.41
我有两个数据集（下面），我想作为一个单一的时间序列进行组合，以在R中进行一些多元分析，但是它们具有不同的频率。第一个每3000年测量一次...
您可以在Mya帧中插入值，而不是在千年帧中删除值。该解决方案产生一个数据框，其中每个列分别对应年龄，d180和CO2。年龄在kya：