Designating color to value in contourf
25 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Jason Redding
am 15 Jun. 2018
Kommentiert: Jorge Pascual
am 3 Dez. 2019
I have a data range from 0 to ~66000 and I need to plot the color white only when z=0 in contourf. I have read through the colormap options related to contourf and none of them suit such a large data set or provide a specific enough answer. There must be an easy fix for this! Thanks in advance!
2 Kommentare
Walter Roberson
am 15 Jun. 2018
Could you confirm that white should be displayed only for z = 0 exactly , and not for z = 0.0001 or z = 1?
Are you supplying a contour level for 0 and a different contour level for the smallest non-zero value?
Akzeptierte Antwort
Walter Roberson
am 15 Jun. 2018
Using hints from https://www.mathworks.com/matlabcentral/answers/363059-how-do-i-label-a-contour-plot-in-the-same-colors-as-the-contour-lines#answer_287606
[~, hContour] = contourf(YourData, [0, other_levels_go_here]);
idx = hContour.LevelList == 0;
hContour.FacePrims(idx).ColorData = uint8([255; 255; 255; 255]);
Weitere Antworten (1)
Jorge Pascual
am 3 Dez. 2019
Good afternoon,
I have a picture about a foot with differents values of pressure, I would like to create a Pedobarography with this values, but as I have a 2D matrix I am having some problems. I would like to fix the maximun value in red, the lowest in blue, and then the rest of the image that isn't foot in black.
Using the answer that @Walter Roberson said I have this error " Unrecognized property 'ColorData' for class 'matlab.graphics.GraphicsPlaceholder'" or maybe I don't undertand how I have to fill the variables that he said.
Thank you in advanced.
2 Kommentare
Walter Roberson
am 3 Dez. 2019
Is idx possibly coming out empty? Is hCounter possibly coming out empty?
Jorge Pascual
am 3 Dez. 2019
The matrix is about 719x272, where the values go between 0-60 and 0 is outside the foot.
So I fill de varibles in this way:
[~, hContour] = contourf(Pedobarography1, [0, 60]);
idx = hContour.LevelList == 0;
hContour.FacePrims(idx).ColorData = uint8([255; 255; 255; 255]);
Siehe auch
Kategorien
Mehr zu Contour Plots finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!