i am executing this code and getting the error""max" previously appeared to be used as a function or command, conflicting with its uis se here as the name of a variable" fow to solve thj

function [tab]=ezww3(X,d)

[h1,h2,g1,g2]=filtres2(d);

[x1000,x2000,x3000,x4000]=decomp_mat(X,h1,h2);%x1000=x1000/2;
[x100,x200,x300,x400]=decomp_mat(x1000,h1,h2);%x100=x100/2;
[x10,x20,x30,x40]=decomp_mat(x100,h1,h2);%x10=x10/2;
[x1,x2,x3,x4]=decomp_mat(x10,h1,h2);%x1=x1/2;
[xx1,xx2,xx3,xx4]=decomp_mat(x1,h1,h2);

[xxx1,xxx2,xxx3,xxx4]=decomp_mat(xx1,h1,h2);%
image([[[[[xx1,xx2;xx3,xx4],x2;x3,x4],x20;x30,x40],x200;x300,x400],x2000;x3000,x4000]),colormap(gray)

round(xxx2);   xxx3=round(xxx3);   xxx4=round(xxx4);
seuil=round(max(max(x1)));

[Greig]

I assume that the error is coming in the last line of the code here and not in the decomp_mat function?

If so, what exactly is x1? If it is a vector or matrix of numbers, there should be no problem.