documents:111012rtricks
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documents:111012rtricks [2012/02/14 22:21] – kota | documents:111012rtricks [2020/11/26 07:08] (current) – kota | ||
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When you import data from the out put of other software, you might have trailing 0s at the end of each column: | When you import data from the out put of other software, you might have trailing 0s at the end of each column: | ||
- | < | + | <code:R> |
> d0 | > d0 | ||
[1] 69.444 70.889 86.667 95.667 83.444 78.333 67.889 | [1] 69.444 70.889 86.667 95.667 83.444 78.333 67.889 | ||
Line 18: | Line 18: | ||
</ | </ | ||
To remove them, there could be many ways, but here is my one liner. | To remove them, there could be many ways, but here is my one liner. | ||
- | <code R> | + | <code:R> |
d0c <- d0[rev(cumsum(rev(d0)))> | d0c <- d0[rev(cumsum(rev(d0)))> | ||
</ | </ | ||
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===== Plotting a matrix data as a color-coded image ===== | ===== Plotting a matrix data as a color-coded image ===== | ||
- | <sxh> | + | <code:R> |
#a 2Dplot, color coded. | #a 2Dplot, color coded. | ||
x <- c(1:20) | x <- c(1:20) | ||
Line 49: | Line 49: | ||
mat <- list(x, y, z) | mat <- list(x, y, z) | ||
image(x, y, z) | image(x, y, z) | ||
- | </sxh> | + | </code> |
[{{: | [{{: | ||
... a bit faster way calculation wise uses indexing. | ... a bit faster way calculation wise uses indexing. | ||
- | <sxh> | + | <code:R> |
width <- 10 | width <- 10 | ||
height <- 20 | height <- 20 | ||
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return (all) | return (all) | ||
} | } | ||
- | </sxh> | + | </code> |
+ | |||
+ | ===== Inserting math formula & symbols in label or title ===== | ||
+ | |||
+ | The easiest way is to use function // | ||
+ | < | ||
+ | plot(back$V2, | ||
+ | </ | ||
+ | Inserts vertically centered dot in the x label between " | ||
+ | < | ||
+ | ?plotmath | ||
+ | </ | ||
+ | |||
+ | More recent, but under development is using [[http:// | ||
+ | |||
+ | ===== Variable Name to String ===== | ||
+ | |||
+ | < | ||
+ | myfunc <- function(v1) { | ||
+ | deparse(substitute(v1)) | ||
+ | } | ||
+ | |||
+ | myfunc(foo) | ||
+ | [1] " | ||
+ | </code> |
documents/111012rtricks.1329258104.txt.gz · Last modified: 2016/05/24 12:46 (external edit)