Clustergram. Changing the range of the colorbar

15 次查看（过去 30 天）

George 2021-4-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/818300-clustergram-changing-the-range-of-the-colorbar

评论： George 2021-5-3

clustergram.png

From a 17x17 array, I've plotted the attached clustergram. The array values range from 1 to 5. The values on the diagonal are equal to 1.

I have the following questions:

The colorbar values are obviously wrong. They range from -3 to 3. The correct range should should be 1 to 5. There no negative values in the array. I tried colormapeditor but failed to find an answer to this problem.
Is there a way to change the colours of the clustergram to correspond to the colorbar (say "parula")?

6 个评论
显示 4更早的评论隐藏 4更早的评论

Adam Danz 2021-5-3

编辑：Adam Danz 2021-5-3

You're missing the line that reads in the table. What is rmsd? When i read in the table using readtable('rmsd.xls') the table cannot be converted to an array.

George 2021-5-3

Thank you Adam.

rmsd.xls was imported into the workspace (rmsd) (17x17 table).

Then it was converted to double: rd = table2array(rmsd);

>> size(rd)

ans =

17 17

>> class(rd)

ans =

'double'

The rest of the code that I used to generate the heatmap/clustergram is as per my email of May 1, 2021

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Adam Danz 2021-5-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/818300-clustergram-changing-the-range-of-the-colorbar#answer_690925

编辑：Adam Danz 2021-5-3

在 MATLAB Online 中打开

The color scale is based on standardized values even if standardize is set to none.

You can set the range of standardized values as a scalar using,

cgo_all = clustergram(rd,___);
cgo_all.DisplayRange = ____

which adjusts the range of the colorbar but will still contain negative values because of standardization.

It may be helpful to review this example from the documentation that explains that the data are standardized so that the mean is 0 which is why colorbar values are +/-.

Also see this coursera course that covers Matlab's Clustergram function.

2 个评论
显示无隐藏无

George 2021-5-3

Many thanks once again.

You're absolutely right. I tweeked setting the 'Standardize' flag to 'none'. The diagonal in this case is zero which coincides with the white colour in the colorbar.

George 2021-5-3