我想在这个pdf的第一页和第二页抓取信息：https://www2.census.gov/programs-surveys/popest/tables/2010-2018/state/asrh/PEPSR6H.pdf
我设法从第一页的表格中获取了一个（混乱的）数据框，但无法抓取第二页。
这是我用来从第一页获取数据框的代码：
library(tabulizer)
library(tidyverse)
link <- "https://www2.census.gov/programs-surveys/popest/tables/2010-2018/state/asrh/PEPSR6H.pdf"
df_page1 = extract_tables(link, output = "data.frame", header = FALSE)
我不知道为什么无法获得第二页的表格。 有人可以在这方面帮助我吗？
【问题讨论】：
标签： r web-scraping data-mining
当你显式设置method="stream"时，你可以从所有页面获取表格，包括第二页：
library("tabulizer")
link <- "https://www2.census.gov/programs-surveys/popest/tables/2010-2018/state/asrh/PEPSR6H.pdf"
extract_tables(link, output = "data.frame", header = FALSE, method="stream")
#> [[1]]
#> V1 V2 V3 V4
#> 1 Geography Total
#> 2 White
#> 3
#> 4
#> 5 United States 308,745,538 241,937,061
#> 6 Alabama 4,779,736 3,362,877
#> 7 Alaska 710,231 483,873
#> 8 Arizona 6,392,017 5,418,483
#> 9 Arkansas 2,915,918 2,342,403
#> 10 California 37,253,956 27,636,403
#> 11 Colorado 5,029,196 4,450,623
#> 12 Connecticut 3,574,097 2,950,820
#> 13 Delaware 897,934 645,770
#> 14 District of Columbia 601,723 251,265
#> 15 Florida 18,801,310 14,808,867
#> 16 Georgia 9,687,653 6,144,931
#> 17 Hawaii 1,360,301 349,051
#> 18 Idaho 1,567,582 1,476,097
#> 19 Illinois 12,830,632 10,030,587
#> 20 Indiana 6,483,802 5,638,833
#> 21 Iowa 3,046,355 2,839,615
#> 22 Kansas 2,853,118 2,501,057
#> 23 Kentucky 4,339,367 3,864,193
#> 24 Louisiana 4,533,372 2,902,875
#> 25 Maine 1,328,361 1,269,764
#> 26 Maryland 5,773,552 3,541,379
#> 27 Massachusetts 6,547,629 5,524,937
#> 28 Michigan 9,883,640 7,949,497
#> 29 Minnesota 5,303,925 4,623,461
#> 30 Mississippi 2,967,297 1,789,391
#> 31 Missouri 5,988,927 5,038,407
#> 32 Montana 989,415 891,529
#> 33 Nebraska 1,826,341 1,649,264
#> 34 Nevada 2,700,551 2,106,494
#> 35 New Hampshire 1,316,470 1,248,321
#> 36 New Jersey 8,791,894 6,546,498
#> 37 New Mexico 2,059,179 1,720,992
#> 38 New York 19,378,102 13,901,661
#> 39 North Carolina 9,535,483 6,898,296
#> 40 North Dakota 672,591 609,136
#> 41 Ohio 11,536,504 9,664,524
#> 42 Oklahoma 3,751,351 2,851,510
#> 43 Oregon 3,831,074 3,403,252
#> 44 Pennsylvania 12,702,379 10,663,774
#> V5 V6
#> 1 Race Alone
#> 2 Black or African American Indian Asian
#> 3 American and Alaska
#> 4 Native
#> 5 40,250,635 3,739,506 15,159,516
#> 6 1,259,224 32,903 55,240
#> 7 24,441 106,268 38,882
#> 8 280,905 335,278 188,456
#> 9 454,021 26,134 37,537
#> 10 2,486,549 622,107 5,038,123
#> 11 214,919 78,144 144,819
#> 12 392,131 16,734 140,516
#> 13 196,281 5,929 29,342
#> 14 310,379 3,264 21,705
#> 15 3,078,067 89,119 474,199
#> 16 2,993,927 48,599 323,459
#> 17 22,473 4,960 531,633
#> 18 10,950 25,782 20,034
#> 19 1,903,458 73,846 604,399
#> 20 603,797 24,487 105,535
#> 21 91,695 13,563 54,232
#> 22 173,298 33,044 69,628
#> 23 342,804 12,105 50,177
#> 24 1,462,969 33,037 71,829
#> 25 16,269 8,771 13,783
#> 26 1,731,513 30,885 326,655
#> 27 504,365 29,944 359,673
#> 28 1,416,067 68,396 243,062
#> 29 280,949 67,325 217,792
#> 30 1,103,101 16,837 26,477
#> 31 700,178 30,595 100,213
#> 32 4,215 63,495 6,379
#> 33 85,971 23,418 33,322
#> 34 231,224 42,965 203,478
#> 35 16,365 3,530 28,933
#> 36 1,282,005 49,907 746,212
#> 37 49,006 208,890 31,253
#> 38 3,378,047 183,046 1,481,555
#> 39 2,088,362 147,566 215,952
#> 40 8,248 36,948 7,032
#> 41 1,426,861 29,674 196,693
#> 42 284,332 335,664 67,126
#> 43 74,414 66,784 145,009
#> 44 1,431,826 39,735 358,195
#>
#> [[2]]
#> V1 V2 V3 V4
#> 1 Geography Total
#> 2 White
#> 3
#> 4
#> 5 Rhode Island 1,052,567 910,253
#> 6 South Carolina 4,625,364 3,164,143
#> 7 South Dakota 814,180 706,690
#> 8 Tennessee 6,346,105 5,056,311
#> 9 Texas 25,145,561 20,389,793
#> 10 Utah 2,763,885 2,547,329
#> 11 Vermont 625,741 598,592
#> 12 Virginia 8,001,024 5,725,432
#> 13 Washington 6,724,540 5,535,262
#> 14 West Virginia 1,852,994 1,746,513
#> 15 Wisconsin 5,686,986 5,036,923
#> 16 Wyoming 563,626 529,110
#> V5 V6
#> 1 Race Alone
#> 2 Black or African American Indian Asian
#> 3 American and Alaska
#> 4 Native
#> 5 75,073 9,173 31,768
#> 6 1,302,865 24,665 61,247
#> 7 10,533 72,782 7,775
#> 8 1,068,010 26,256 93,897
#> 9 3,070,440 251,209 1,000,473
#> 10 33,864 40,729 57,800
#> 11 6,456 2,308 8,069
#> 12 1,579,414 41,525 449,149
#> 13 252,333 122,649 491,685
#> 14 63,885 3,975 12,637
#> 15 367,021 60,100 131,828
#> 16 5,135 14,457 4,649
#>
#> [[3]]
#> V1 V2 V3 V4
#> 1 Geography Race Alone Two or More
#> 2 Races
#> 3 Native Hawaiian
#> 4 and Other Pacific
#> 5 Islander
#> 6 United States 674,625 6,984,195
#> 7 Alabama 5,208 64,284
#> 8 Alaska 7,662 49,105
#> 9 Arizona 16,112 152,783
#> 10 Arkansas 6,685 49,138
#> 11 California 181,431 1,289,343
#> 12 Colorado 8,420 132,271
#> 13 Connecticut 3,491 70,405
#> 14 Delaware 690 19,922
#> 15 District of Columbia 770 14,340
#> 16 Florida 18,790 332,268
#> 17 Georgia 10,454 166,283
#> 18 Hawaii 138,292 313,892
#> 19 Idaho 2,786 31,933
#> 20 Illinois 7,436 210,906
#> 21 Indiana 3,532 107,618
#> 22 Iowa 2,419 44,831
#> 23 Kansas 2,864 73,227
#> 24 Kentucky 3,199 66,889
#> 25 Louisiana 2,588 60,074
#> 26 Maine 377 19,397
#> 27 Maryland 5,391 137,729
#> 28 Massachusetts 5,971 122,739
#> 29 Michigan 3,442 203,176
#> 30 Minnesota 2,958 111,440
#> 31 Mississippi 1,700 29,791
#> 32 Missouri 7,178 112,356
#> 33 Montana 734 23,063
#> 34 Nebraska 2,061 32,305
#> 35 Nevada 19,307 97,083
#> 36 New Hampshire 532 18,789
#> 37 New Jersey 7,731 159,541
#> 38 New Mexico 3,132 45,906
#> 39 New York 24,000 409,793
#> 40 North Carolina 10,309 174,998
#> 41 North Dakota 334 10,893
#> 42 Ohio 5,336 213,416
#> 43 Oklahoma 5,354 207,365
#> 44 Oregon 14,649 126,966
#> 45 Pennsylvania 7,115 201,734
#> 46 Rhode Island 1,602 24,698
#> 47 South Carolina 3,957 68,487
#> 48 South Dakota 517 15,883
#> 49 Tennessee 5,426 96,205
#> 50 Texas 31,242 402,404
#> 51 Utah 26,049 58,114
#> 52 Vermont 175 10,141
#> 53 Virginia 8,201 197,303
#> 54 Washington 43,505 279,106
#> 55 West Virginia 485 25,499
#> 56 Wisconsin 2,505 88,609
#> 57 Wyoming ``` r
library("tabulizer")
link <- "https://www2.census.gov/programs-surveys/popest/tables/2010-2018/state/asrh/PEPSR6H.pdf"
extract_tables(link, output = "data.frame", header = FALSE, method="stream")
#> [[1]]
#> V1 V2 V3 V4
#> 1 Geography Total
#> 2 White
#> 3
#> 4
#> 5 United States 308,745,538 241,937,061
#> 6 Alabama 4,779,736 3,362,877
#> 7 Alaska 710,231 483,873
#> 8 Arizona 6,392,017 5,418,483
#> 9 Arkansas 2,915,918 2,342,403
#> 10 California 37,253,956 27,636,403
#> 11 Colorado 5,029,196 4,450,623
#> 12 Connecticut 3,574,097 2,950,820
#> 13 Delaware 897,934 645,770
#> 14 District of Columbia 601,723 251,265
#> 15 Florida 18,801,310 14,808,867
#> 16 Georgia 9,687,653 6,144,931
#> 17 Hawaii 1,360,301 349,051
#> 18 Idaho 1,567,582 1,476,097
#> 19 Illinois 12,830,632 10,030,587
#> 20 Indiana 6,483,802 5,638,833
#> 21 Iowa 3,046,355 2,839,615
#> 22 Kansas 2,853,118 2,501,057
#> 23 Kentucky 4,339,367 3,864,193
#> 24 Louisiana 4,533,372 2,902,875
#> 25 Maine 1,328,361 1,269,764
#> 26 Maryland 5,773,552 3,541,379
#> 27 Massachusetts 6,547,629 5,524,937
#> 28 Michigan 9,883,640 7,949,497
#> 29 Minnesota 5,303,925 4,623,461
#> 30 Mississippi 2,967,297 1,789,391
#> 31 Missouri 5,988,927 5,038,407
#> 32 Montana 989,415 891,529
#> 33 Nebraska 1,826,341 1,649,264
#> 34 Nevada 2,700,551 2,106,494
#> 35 New Hampshire 1,316,470 1,248,321
#> 36 New Jersey 8,791,894 6,546,498
#> 37 New Mexico 2,059,179 1,720,992
#> 38 New York 19,378,102 13,901,661
#> 39 North Carolina 9,535,483 6,898,296
#> 40 North Dakota 672,591 609,136
#> 41 Ohio 11,536,504 9,664,524
#> 42 Oklahoma 3,751,351 2,851,510
#> 43 Oregon 3,831,074 3,403,252
#> 44 Pennsylvania 12,702,379 10,663,774
#> V5 V6
#> 1 Race Alone
#> 2 Black or African American Indian Asian
#> 3 American and Alaska
#> 4 Native
#> 5 40,250,635 3,739,506 15,159,516
#> 6 1,259,224 32,903 55,240
#> 7 24,441 106,268 38,882
#> 8 280,905 335,278 188,456
#> 9 454,021 26,134 37,537
#> 10 2,486,549 622,107 5,038,123
#> 11 214,919 78,144 144,819
#> 12 392,131 16,734 140,516
#> 13 196,281 5,929 29,342
#> 14 310,379 3,264 21,705
#> 15 3,078,067 89,119 474,199
#> 16 2,993,927 48,599 323,459
#> 17 22,473 4,960 531,633
#> 18 10,950 25,782 20,034
#> 19 1,903,458 73,846 604,399
#> 20 603,797 24,487 105,535
#> 21 91,695 13,563 54,232
#> 22 173,298 33,044 69,628
#> 23 342,804 12,105 50,177
#> 24 1,462,969 33,037 71,829
#> 25 16,269 8,771 13,783
#> 26 1,731,513 30,885 326,655
#> 27 504,365 29,944 359,673
#> 28 1,416,067 68,396 243,062
#> 29 280,949 67,325 217,792
#> 30 1,103,101 16,837 26,477
#> 31 700,178 30,595 100,213
#> 32 4,215 63,495 6,379
#> 33 85,971 23,418 33,322
#> 34 231,224 42,965 203,478
#> 35 16,365 3,530 28,933
#> 36 1,282,005 49,907 746,212
#> 37 49,006 208,890 31,253
#> 38 3,378,047 183,046 1,481,555
#> 39 2,088,362 147,566 215,952
#> 40 8,248 36,948 7,032
#> 41 1,426,861 29,674 196,693
#> 42 284,332 335,664 67,126
#> 43 74,414 66,784 145,009
#> 44 1,431,826 39,735 358,195
#>
#> [[2]]
#> V1 V2 V3 V4
#> 1 Geography Total
#> 2 White
#> 3
#> 4
#> 5 Rhode Island 1,052,567 910,253
#> 6 South Carolina 4,625,364 3,164,143
#> 7 South Dakota 814,180 706,690
#> 8 Tennessee 6,346,105 5,056,311
#> 9 Texas 25,145,561 20,389,793
#> 10 Utah 2,763,885 2,547,329
#> 11 Vermont 625,741 598,592
#> 12 Virginia 8,001,024 5,725,432
#> 13 Washington 6,724,540 5,535,262
#> 14 West Virginia 1,852,994 1,746,513
#> 15 Wisconsin 5,686,986 5,036,923
#> 16 Wyoming 563,626 529,110
#> V5 V6
#> 1 Race Alone
#> 2 Black or African American Indian Asian
#> 3 American and Alaska
#> 4 Native
#> 5 75,073 9,173 31,768
#> 6 1,302,865 24,665 61,247
#> 7 10,533 72,782 7,775
#> 8 1,068,010 26,256 93,897
#> 9 3,070,440 251,209 1,000,473
#> 10 33,864 40,729 57,800
#> 11 6,456 2,308 8,069
#> 12 1,579,414 41,525 449,149
#> 13 252,333 122,649 491,685
#> 14 63,885 3,975 12,637
#> 15 367,021 60,100 131,828
#> 16 5,135 14,457 4,649
#>
#> [[3]]
#> V1 V2 V3 V4
#> 1 Geography Race Alone Two or More
#> 2 Races
#> 3 Native Hawaiian
#> 4 and Other Pacific
#> 5 Islander
#> 6 United States 674,625 6,984,195
#> 7 Alabama 5,208 64,284
#> 8 Alaska 7,662 49,105
#> 9 Arizona 16,112 152,783
#> 10 Arkansas 6,685 49,138
#> 11 California 181,431 1,289,343
#> 12 Colorado 8,420 132,271
#> 13 Connecticut 3,491 70,405
#> 14 Delaware 690 19,922
#> 15 District of Columbia 770 14,340
#> 16 Florida 18,790 332,268
#> 17 Georgia 10,454 166,283
#> 18 Hawaii 138,292 313,892
#> 19 Idaho 2,786 31,933
#> 20 Illinois 7,436 210,906
#> 21 Indiana 3,532 107,618
#> 22 Iowa 2,419 44,831
#> 23 Kansas 2,864 73,227
#> 24 Kentucky 3,199 66,889
#> 25 Louisiana 2,588 60,074
#> 26 Maine 377 19,397
#> 27 Maryland 5,391 137,729
#> 28 Massachusetts 5,971 122,739
#> 29 Michigan 3,442 203,176
#> 30 Minnesota 2,958 111,440
#> 31 Mississippi 1,700 29,791
#> 32 Missouri 7,178 112,356
#> 33 Montana 734 23,063
#> 34 Nebraska 2,061 32,305
#> 35 Nevada 19,307 97,083
#> 36 New Hampshire 532 18,789
#> 37 New Jersey 7,731 159,541
#> 38 New Mexico 3,132 45,906
#> 39 New York 24,000 409,793
#> 40 North Carolina 10,309 174,998
#> 41 North Dakota 334 10,893
#> 42 Ohio 5,336 213,416
#> 43 Oklahoma 5,354 207,365
#> 44 Oregon 14,649 126,966
#> 45 Pennsylvania 7,115 201,734
#> 46 Rhode Island 1,602 24,698
#> 47 South Carolina 3,957 68,487
#> 48 South Dakota 517 15,883
#> 49 Tennessee 5,426 96,205
#> 50 Texas 31,242 402,404
#> 51 Utah 26,049 58,114
#> 52 Vermont 175 10,141
#> 53 Virginia 8,201 197,303
#> 54 Washington 43,505 279,106
#> 55 West Virginia 485 25,499
#> 56 Wisconsin 2,505 88,609
#> 57 Wyoming 521 9,754
由reprex package (v0.3.0) 于 2020 年 6 月 13 日创建 521 9,754
<sup>Created on 2020-06-13 by the [reprex package](https://reprex.tidyverse.org) (v0.3.0)</sup>
【讨论】：