imagesc {matlab} | R Documentation |
Scales image data to the full range of the current palette and displays the image.
imagesc(x = seq(ncol(C)), y = seq(nrow(C)), C, col = jet.colors(12), ...)
x,y |
locations of grid lines at which the values in C are
measured. These must be finite, non-missing and in (strictly)
ascending order. By default, the dimensions of C are used. |
C |
numeric matrix representing data to be plotted. Note that
x can be used instead of C for convenience. |
col |
vector of colors used to display image data |
... |
graphical parameters for image may also be passed as arguments to this method |
Each element of C
corresponds to a rectangular area in the image.
The values of the elements of C
are indices into the current
palette that determine the color of each patch.
The method interprets the matrix data as a table of f(x[i], y[j])
values,
so that the x axis corresponds to column number and the y axis to row number,
with row 1 at the top, i.e., the same as the conventional printed layout
of a matrix.
P. Roebuck, roebuck@mdanderson.org
values <- matrix(c(seq(1, 5, by = 1), seq(2, 10, by = 2), seq(3, 15, by = 3)), nrow = 3, byrow = TRUE) imagesc(values, xlab = "cols", ylab = "rows", col = jet.colors(16))