Undefined function 'mtimes' for input arguments of type 'matlab.gr​aphics.cha​rt.primiti​ve.Histogr​am'.

My code gives error in last line, I could not find why,

Please help me!

Undefined function 'mtimes' for input arguments of type 'matlab.graphics.chart.primitive.Histogram'.

Error in a_mutual_information_64 (line 32)

s(i,j)= H(i,j)*(log2(H(i,j)/(h1(i)*h2(j))));

[Org, map1] = dicomread("ad-talarich\a4\ADNI_131_S_0497_PT_Talairach_Warped_Br_20080307132607768_3_S15907_I95832.dcm")

[Ref, map2] = dicomread('cn-talararich\a97\ADNI_005_S_0610_PT_Talairach_Warped_Br_20080306090318595_2_S17355_I95406.dcm')

a = double(Org);

b = double(Ref);

%a = Org(:);

%b = Ref(:);

n = length(a);

H = zeros(25600,25600);

for i = 1:n

x = a(i);

y = b(i);

H(x+1,y+1) = H(x+1,y+1) + 1 ;

end

h1 = histogram(a/n);

h2 = histogram(b/n);

s = zeros(64,64);

H = H/n;

for i = 1: 64

for j = 1:64

if H(i,j) == 0 || h1(i) == 0 || h2(j) == 0

s(i,j) = 0;

else

s(i,j)= H(i,j)*(log2(H(i,j)/(h1(i)*h2(j))));

end

end

end

Answer 1

[Voss]

Right now, h1 and h2 are Histogram objects, and it doesn't make sense to multiply two histogram objects. This is what the error message is saying.

[Image Analyst]

Perhaps Ceren wants histcounts() instead of histogram(). histcounts() returns a vector of bin heights, while histogram returns an object class with all kinds of various properties.

[Walter Roberson]

perhaps histcounts() instead of histogram()

[Ceren yüksel]

histcount exactly worked thank you! @Walter Roberson @Image Analyst