She studied this from a phsychometric perspective and crafted the colors and Cynthia Brewer, Mark Harrower and The Pennsylvania State University LineStyles = linspecer(N,'sequential') forces the colors to vary along a spectrumĪxes('NextPlot','replacechildren', 'ColorOrder',C) įigure imagesc(A) colormap(linspecer) % linspecer colormapĬredits and where the function came from: LineStyles = linspecer(N,'qualitative') forces the colors to all be distinguishable (up to 12) LineStyles = linspecer(N) makes N colors for you to use: lineStyles(ii,:)Ĭolormap(linspecer) set your colormap to have easily distinguishable colors and a pleasing aesthetic These can be used to plot lots of lines with distinguishable and nice looking colors. This function creates an Nx3 array of N colors It is based off the research of professor Cynthia Brewer (colorbrewer!) but amazingly easy to use. This function creates distinguishable colors by spacing them out ~equally in *perceptive* space, not in RGB space.

colormap is an M-file that sets and gets this property.The default Matlab default line spec and colormaps are astoundingly crude. To view the image, type the following commands:Įach figure has its own Colormap property. The demos directory contains a CAT scan image of a human spine. The following commands display the flujet data using the jet colormap. Try rgbplot(hsv), rgbplot(gray), and rgbplot(hot). The rgbplot function plots colormap values. Selecting Colormap Menu gives access to a number of other colormaps. The hsv colormap starts with red in the center, then passes through yellow, green, cyan, blue, and magenta before returning to red at the outside end of the spiral. This uses the pcolor function to display a 16-by-16 matrix whose elements vary from 0 to 255 in a rectilinear spiral. The images and colormaps demo, imagedemo, provides an introduction to colormaps. winter consists of colors that are shades of blue and green.white is an all white monochrome colormap.summer consists of colors that are shades of green and yellow.spring consists of colors that are shades of magenta and yellow.prism repeats the six colors red, orange, yellow, green, blue, and violet.The pink colormap provides sepia tone colorization of grayscale photographs. lines produces a colormap of colors specified by the axes ColorOrder property and a shade of gray.The jet colormap is associated with an astrophysical fluid jet simulation from the National Center for Supercomputer Applications. jet ranges from blue to red, and passes through the colors cyan, yellow, and orange.hsv(m) is the same as hsv2rgb() where h is the linear ramp, h = (0:m-1)'/m. The colormap is particularly appropriate for displaying periodic functions. The colors begin with red, pass through yellow, green, cyan, blue, magenta, and return to red. hsv varies the hue component of the hue-saturation-value color model.hot varies smoothly from black through shades of red, orange, and yellow, to white.gray returns a linear grayscale colormap.This colormap completely changes color with each index increment. flag consists of the colors red, white, blue, and black.copper varies smoothly from black to bright copper.cool consists of colors that are shades of cyan and magenta.colorcube contains as many regularly spaced colors in RGB colorspace as possible, while attempting to provide more steps of gray, pure red, pure green, and pure blue.

This colormap is useful for adding an 'electronic' look to grayscale images.

bone is a grayscale colormap with a higher value for the blue component.

autumn varies smoothly from red, through orange, to yellow.

The named built-in colormaps are the following:

In addition to specifying built-in colormaps programmatically, you can use the Colormap menu in the Figure Properties pane of the Plot Tools GUI to select one interactively. MATLAB supports a number of built-in colormaps, illustrated and described below. If you do not specify a size, MATLAB creates a colormap the same size as the current colormap. For example,Ĭreates an hsv colormap with 128 colors. Each M-file accepts the colormap size as an argument. M-files in the color directory generate a number of colormaps. Sets the current colormap to the default colormap. If any values in map are outside the interval, MATLAB returns the error Colormap must have values in. The kth row of the colormap defines the kth color, where map(k,:) = ) specifies the intensity of red, green, and blue. Each row is an RGB vector that defines one color. Colormap (MATLAB Functions) MATLAB Function ReferenceĪ colormap is an m-by-3 matrix of real numbers between 0.0 and 1.0.

Matlab colormaps