If clr is a cell array of strings, the length of clr must be equal to the length of x, y and z.

Hello, I have problem in gscatter3(). The link of gscatter3 is as follow:

https://www.mathworks.com/matlabcentral/fileexchange/37970-gscatter3

Thanks in advance for any help!

>> stage265_tran=stage265';

>> [~, scores,pcvars]=pca(stage265_tran);

>> x265=zscore(scores(:,1));

>> y265=zscore(scores(:,2));

>> z265=zscore(scores(:,3));

>> gscatter3(x265,y265,z265,cellstr(tmp265),{'b','g','m'},{'.','.','.'},15)

If clr is a cell array of strings, the length of clr must be equal to the length of x, y and z.

In my workspace:

stage265_tran <265x100>

scores <265x100>

pcvars <100x1>

x265 <265x1>

y265 <265x1>

z265 <265x1>

tmp265 <1x265>

[yue li]

clr, the 5th parameter,has only three elements, tmp265 should only has three elements

Answer 1

[Aditya]

Hi Yue,

The error message you're encountering indicates that the clr parameter in the gscatter3 function expects a cell array of color strings whose length matches the number of data points, not the number of unique groups. This suggests that the function might be expecting a color specification for each individual point, rather than for each group.

Assuming tmp265 correctly specifies groups, and gscatter3 is intended to work similarly to MATLAB's built-in gscatter, you might try:

% Convert tmp265 to a categorical array if it's not already
group = categorical(tmp265);

% Ensure clr is specified for each unique group
uniqueGroups = categories(group);
numGroups = numel(uniqueGroups);

% Define colors for each group
clr = {'b', 'g', 'm'}; % Ensure this matches the number of unique groups

% Define marker types for each group
markerTypes = {'.', '.', '.'}; % Ensure this matches the number of unique groups

% Plot using gscatter3
gscatter3(x265, y265, z265, group, clr(1:numGroups), markerTypes(1:numGroups), 15);