divergeZimage {TIMP} | R Documentation |
An image plot of a matrix is a way of visualizing data; when the data represents a quantity like transient absorption, where negative values represent a different phenomena than positive values, it can be useful to set values at zero in the image plot to grey, whereas positive values are assigned to red, and negative values are assigned to blue. Alternately, when comparing image plots of several matrices, it may be useful to set the value assigned to grey uniformly, with values above this threshold assigned to red, and below this threshold assigned to blue.
divergeZimage(ob, out=FALSE, file="divergeZimage.pdf", lin = 1, title = "", center = 0, x2 = vector(), x= vector(), plainmat = FALSE, ylab="wavelength (nm)", xlab = "time (ns)")
ob |
either an object of class dat or a numeric matrix; if a
numeric matrix is given then set plainmat=TRUE and specify labels
for the columns of matrix in x2 and for the rows of the matrix in
x |
out |
a logical indicating whether to write to the screen in the
case that this is possible or to a file; if TRUE , writes to a pdf
file |
file |
a character vector giving a filename to write to in the case
that out=TRUE |
lin |
range of x to plot linearly; values not
between -lin and lin are plotted on a log scale |
title |
character vector giving a title for the plot |
center |
point assigned to grey in the diverging palette. |
x2 |
vector of labels for the columns of the matrix; used only if
plainmat=TRUE |
x |
vector of labels for the rows of the matrix; used only if
plainmat=TRUE |
plainmat |
logical indicating whether ob is a matrix, as
opposed to an object of class dat |
ylab |
character vector giving a label to put on the y-axis |
xlab |
character vector giving a label to put on the x-axis |
Katharine M. Mullen, Ivo H. M. van Stokkum
exd <- dat(psi.df=matrix(rnorm(1000), ncol=100, nrow=100), x=1:100,x2=1:100, nl=as.integer(100), nt=as.integer(100)) ## by default linear range until 1 is used, logarithmic thereafter divergeZimage(exd) ## can change this as desired divergeZimage(exd, lin=10, title="plot linearly to 10")