Hi, let me correct my previous post ("zeros in double matrix rather than character matrix").
I have included entries from the .csv file that has 4 columns of 1000 columns and 101 rows. The first column with the "Time (day)" will not be removed, but the row headers are the numbers 1 to 1000 and they will remain in the matrix. In the previous post I mentioned that R makes the 1000 columns and the 101 rows into a "101x0 character matrix" once I removed the 1st column "Time (day)". Instead I want this to be a "101x1000 double matrix". What needs to be done to make the .csv into a double matrix rather than a character matrix when the first row is all zeros (0s)? Thank-you. Irucka Embry This is the code that I am using: Input <- as.matrix(read.csv("Input_Parameter.csv", header = TRUE, sep =",")) Input <- as.matrix(Input[,-1]) # remove column 1 from analysis This is some of the values that are being read from the .csv file: Time (day) 1 2 3 4 0 0 0 0 0 1 0.16387 0.60612 0.87705 0.83798 2 0.32774 1.2122 1.7541 1.676 3 0.4916 1.8184 2.6312 2.5139 4 0.65547 2.4245 3.5082 3.3519 5 0.81934 3.0306 4.3853 4.1899 6 0.98321 3.6367 5.2623 5.0279 7 1.1471 4.2429 6.1394 5.8659 8 1.3109 4.849 7.0164 6.7038 9 1.4748 5.4551 7.8935 7.5418 10 1.6387 6.0612 8.7705 8.3798 11 1.8026 6.6673 9.6476 9.2178 12 1.9664 7.2735 10.525 10.056 13 2.1303 7.8796 11.402 10.894 14 2.2942 8.4857 12.279 11.732 15 2.458 9.0918 13.156 12.57 16 2.6219 9.6979 14.033 13.408 17 2.7858 10.304 14.91 14.246 18 2.9496 10.91 15.787 15.084 19 3.1135 11.516 16.664 15.922 20 3.2774 12.122 17.541 16.76 21 3.4412 12.729 18.418 17.598 22 3.6051 13.335 19.295 18.436 23 3.769 13.941 20.172 19.274 24 3.9328 14.547 21.049 20.112 25 4.0967 15.153 21.926 20.95 26 4.2606 15.759 22.803 21.788 27 4.4244 16.365 23.68 22.625 28 4.5883 16.971 24.557 23.463 29 4.7522 17.578 25.434 24.301 30 4.916 18.184 26.312 25.139 31 5.0799 18.79 27.189 25.977 32 5.2438 19.396 28.066 26.815 33 5.4077 20.002 28.943 27.653 34 5.5715 20.608 29.82 28.491 35 5.7354 21.214 30.697 29.329 36 5.8993 21.82 31.574 30.167 37 6.0631 22.426 32.451 31.005 38 6.227 23.033 33.328 31.843 39 6.3909 23.639 34.205 32.681 40 6.5547 24.245 35.082 33.519 41 6.7186 24.851 35.959 34.357 42 6.8825 25.457 36.836 35.195 43 7.0463 26.063 37.713 36.033 44 7.2102 26.669 38.59 36.871 45 7.3741 27.275 39.467 37.709 46 7.5379 27.882 40.344 38.547 47 7.7018 28.488 41.221 39.385 48 7.8657 29.094 42.098 40.223 49 8.0295 29.7 42.976 41.061 50 8.1934 30.306 43.853 41.899 51 8.1115 30.003 43.414 41.48 52 8.0295 29.7 42.976 41.061 53 7.9476 29.397 42.537 40.642 54 7.8657 29.094 42.098 40.223 55 7.7837 28.791 41.66 39.804 56 7.7018 28.488 41.221 39.385 57 7.6199 28.185 40.783 38.966 58 7.5379 27.882 40.344 38.547 59 7.456 27.579 39.906 38.128 60 7.3741 27.275 39.467 37.709 61 7.2921 26.972 39.029 37.29 62 7.2102 26.669 38.59 36.871 63 7.1283 26.366 38.152 36.452 64 7.0463 26.063 37.713 36.033 65 6.9644 25.76 37.275 35.614 66 6.8825 25.457 36.836 35.195 67 6.8005 25.154 36.398 34.776 68 6.7186 24.851 35.959 34.357 69 6.6367 24.548 35.521 33.938 70 6.5547 24.245 35.082 33.519 71 6.4728 23.942 34.644 33.1 72 6.3909 23.639 34.205 32.681 73 6.3089 23.336 33.766 32.262 74 6.227 23.033 33.328 31.843 75 6.1451 22.73 32.889 31.424 76 6.0631 22.426 32.451 31.005 77 5.9812 22.123 32.012 30.586 78 5.8993 21.82 31.574 30.167 79 5.8173 21.517 31.135 29.748 80 5.7354 21.214 30.697 29.329 81 5.6535 20.911 30.258 28.91 82 5.5715 20.608 29.82 28.491 83 5.4896 20.305 29.381 28.072 84 5.4077 20.002 28.943 27.653 85 5.3257 19.699 28.504 27.234 86 5.2438 19.396 28.066 26.815 87 5.1618 19.093 27.627 26.396 88 5.0799 18.79 27.189 25.977 89 4.998 18.487 26.75 25.558 90 4.916 18.184 26.312 25.139 91 4.8341 17.881 25.873 24.72 92 4.7522 17.578 25.434 24.301 93 4.6702 17.274 24.996 23.882 94 4.5883 16.971 24.557 23.463 95 4.5064 16.668 24.119 23.044 96 4.4244 16.365 23.68 22.625 97 4.3425 16.062 23.242 22.206 98 4.2606 15.759 22.803 21.788 99 4.1786 15.456 22.365 21.369 100 4.0967 15.153 21.926 20.95 -- View this message in context: http://r.789695.n4.nabble.com/how-to-keep-all-zeros-in-1st-row-not-NA-tp4651132.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.