Problem in Dimensionality reduction

Hello everyone, I have an excel file and I would like to apply dimensionality reduction.

I wrote this:

    %%Clean up

clc
close all
clear all

%%I/O Parameters
InputFilesPath = 'C:\Users\Federico\Desktop\Chiara\Dissertation\Matlab Program - v0\Input Files\';
InputFileName = 'leukemia modified';
OutputFilePath = 'C:\Users\Federico\Desktop\Chiara\Dissertation\Matlab Program - v0\Output Files\';
[GEData,X,vX]=xlsread(strcat(InputFilesPath,InputFileName)); 
GenesNumber = size(GEData,1);
dim = size(GEData,2);
vX(1,:)=[];                           
coeff = pca(vX);

But I am getting this error:

*Undefined function 'isnan' for input arguments of type 'cell'.

Error in pca (line 248)

nanIdx = isnan(x);

Error in testpca (line 17)

coeff = pca(vX);

Error in run (line 63)_ * * *

evalin('caller', [script ';']);*

How can I remove it? Thank you in advance

Answer 1

[Titus Edelhofer]

Ciao Chiara,

the third return parameter from xlsread is a cell array, you will need to convert vX to a matrix using cell2mat.

Or you use the variable X instead that should be the numbers from your Excel sheet (in matrix format already).

Titus

Answer 2

[chiara]

ok I did it but I still have the same error :(

Answer 3

[chiara]

Ops no sorry is Solved thank youuuuuuuuuu :)))

Answer 4

[chiara]

thank you again :)