Unable to reproduce:
> ?data.matrix
> x <- read.table(textConnection(" ALL ALL.1 ALL.2 ALL.3 ALL.4 ALL.5
ALL.6 ALL.7 ALL.8 ALL.9 ALL.10 ALL.11
+ 2 -214 -139 -76 -135 -106 -138 -72 -413 5 -88
-165 -67
+ 3 -153 -73 -49 -114 -125 -85 -144 -260 -127 -105
-155 -93
+ 4 -58 -1 -307 265 -76 215 238 7 106 42
-71 84"), header=TRUE)
> x
ALL ALL.1 ALL.2 ALL.3 ALL.4 ALL.5 ALL.6 ALL.7 ALL.8 ALL.9 ALL.10
ALL.11
2 -214 -139 -76 -135 -106 -138 -72 -413 5 -88 -165
-67
3 -153 -73 -49 -114 -125 -85 -144 -260 -127 -105 -155
-93
4 -58 -1 -307 265 -76 215 238 7 106 42
-71 84
> data.matrix(x)
ALL ALL.1 ALL.2 ALL.3 ALL.4 ALL.5 ALL.6 ALL.7 ALL.8 ALL.9 ALL.10
ALL.11
2 -214 -139 -76 -135 -106 -138 -72 -413 5 -88 -165
-67
3 -153 -73 -49 -114 -125 -85 -144 -260 -127 -105 -155
-93
4 -58 -1 -307 265 -76 215 238 7 106 42
-71 84
You may have something else in that dataframe that is not apparent on
a simple print display. Can you instead provide the results of dput(x)?
--
David Winsemius
On May 31, 2009, at 9:29 AM, Hongyuan Cao wrote:
Dear R user,
I am trying to convert the contents of a date.frame to a matrix.
Since there
are negative values in the date.frame, when I use data.matrix(x,
rownames.force = NA), the resulting matrix is not the same as the
original
one. Basically I think R treats the numbers in the date.frame as
character
and converts it to corresponding numerics.
Any idea on this issue?
Many Thanks,
Hongyuan
x[1:3,]
ALL ALL.1 ALL.2 ALL.3 ALL.4 ALL.5 ALL.6 ALL.7 ALL.8 ALL.9 ALL.10
ALL.11
2 -214 -139 -76 -135 -106 -138 -72 -413 5 -88
-165 -67
3 -153 -73 -49 -114 -125 -85 -144 -260 -127 -105
-155 -93
4 -58 -1 -307 265 -76 215 238 7 106 42
-71 84
ALL.12 ALL.13 ALL.14 ALL.15 ALL.16 ALL.17 ALL.18 ALL.19 ALL.20 ALL.21
ALL.22
2 -92 -113 -107 -117 -476 -81 -44 17 -144
-247
-74
3 -119 -147 -72 -219 -213 -150 -51 -229 -199
-90
-321
4 -31 -118 -126 -50 -18 -119 100 79 -157
-168
-11
ALL.23 ALL.24 ALL.25 ALL.26 AML AML.1 AML.2 AML.3 AML.4 AML.5 AML.
6 AML.7
2 -120 -81 -112 -273 -20 7 -213 -25 -72 -4
15 -318
3 -263 -150 -233 -327 -207 -100 -252 -20 -139 -116
-114 -192
4 -114 -85 -78 -76 -50 -57 136 124 -1 -125
2 -95
AML.8 AML.9 AML.10 ALL.27 ALL.28 ALL.29 ALL.30 ALL.31 ALL.32 ALL.33
ALL.34
2 -32 -124 -135 -342 -87 22 -243 -130 -256
-62 86
3 -49 -79 -186 -200 -248 -153 -218 -177 -249
-23 -36
4 49 -37 -70 41 262 17 -163 -28 -410
-7 -141
ALL.35 ALL.36 ALL.37 ALL.38 ALL.39 ALL.40 ALL.41 ALL.42 ALL.43 ALL.44
ALL.45
2 -146 -187 -56 -55 -59 -131 -154 -79 -76
-34
-95
3 -74 -187 -43 -44 -114 -126 -136 -118 -98
-144
-118
4 170 312 43 12 23 -50 49 -30 -153
-17
59
ALL.46 AML.11 AML.12 AML.13 AML.14 AML.15 AML.16 AML.17 AML.18 AML.19
AML.20
2 -12 -21 -202 -112 -118 -90 -137 -157 -172
-47
-62
3 -172 -13 -274 -185 -142 -87 -51 -370 -122
-442
-198
4 12 8 59 24 212 102 -82 -77 38
-21
-5
AML.21 AML.22 AML.23 AML.24
2 -58 -161 -48 -176
3 -217 -215 -531 -284
4 63 -46 -124 -81
help(as.matrix)
y = data.matrix(x, rownames.force = NA)
y[1:3,]
ALL ALL.1 ALL.2 ALL.3 ALL.4 ALL.5 ALL.6 ALL.7 ALL.8 ALL.9 ALL.10
ALL.11
2 195 75 620 76 13 58 466 399 1967 472
97 377
3 106 533 467 37 39 433 89 278 68 12
83 432
4 499 1 315 1458 407 891 1096 1819 718 1320 476
1436
ALL.12 ALL.13 ALL.14 ALL.15 ALL.16 ALL.17 ALL.18 ALL.19 ALL.20 ALL.21
ALL.22
2 446 25 11 30 489 428 308 1156 52
178
381
3 30 87 438 159 244 61 346 188 103
482
196
4 219 33 37 383 186 28 474 2449 64
101
23
ALL.23 ALL.24 ALL.25 ALL.26 AML AML.1 AML.2 AML.3 AML.4 AML.5 AML.6
AML.7
2 35 485 23 278 173 1178 186 254 545 362
602 318
3 203 81 167 330 181 1 228 190 75 39
20 181
4 26 496 467 596 443 276 869 867 1 55
775 676
AML.8 AML.9 AML.10 ALL.27 ALL.28 ALL.29 ALL.30 ALL.31 ALL.32 ALL.33
ALL.34
2 273 67 102 169 544 1043 87 63 272
294 1226
3 386 615 190 94 196 86 74 130 267
109 170
4 1569 360 611 1004 1162 897 43 241 404
308 48
ALL.35 ALL.36 ALL.37 ALL.38 ALL.39 ALL.40 ALL.41 ALL.42 ALL.43 ALL.44
ALL.45
2 55 130 253 281 376 38 89 466 361
133
329
3 372 130 213 238 24 33 66 32 397
36
25
4 725 1231 1041 488 1028 316 1748 222 60
50
1020
ALL.46 AML.11 AML.12 AML.13 AML.14 AML.15 AML.16 AML.17 AML.18 AML.19
AML.20
2 22 131 170 21 47 381 36 67 77
279
403
3 52 42 245 100 97 374 236 166 28
265
130
4 397 1714 1932 915 1289 409 316 293 1054
136
351
AML.21 AML.22 AML.23 AML.24
2 218 132 324 76
3 74 209 344 140
4 1015 420 65 342
[[alternative HTML version deleted]]
______________________________________________
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.
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
______________________________________________
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.
