### How can I create histogram from a set of values in OpenCV?

I have a text file which consist of several values. These values represent distance from origin to any point in the triangle. How can I create histogram from these values? Is there any functions in OpenCV which can create histogram from these values? Below my sample values are given:

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3.4 1.2 6.9 0.2 5.1 2.9

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I tried in this way , but output is not acceptable.

 ``123456789101112131415161718192021`` ``````int main(.......) { ...................... double histogram_sample[1][6]={1.0,2.0,3.0,4.0,1.0,2.0}; Mat histogram(1,6,CV_64F,(void*)histogram_sample); int histSize = 4; float range[] = { 1.0, 4.0 } ; const float* histRange = { range }; bool uniform = true; bool accumulate = false; Mat hist; calcHist( &histogram, 1, 0, Mat(), hist, 1, &histSize, &histRange, uniform, accumulate ); cout<<"hist:"<

Output: hist:[0;0;0;0]
Here is the complete solution:

 ``123456789101112131415161718192021`` ``````int main(.......) { ...................... float histogram_sample[1][6]={1.0,2.0,3.0,4.0,1.0,2.0}; Mat histogram(1,6,CV_32F,(void*)histogram_sample); int histSize = 4; float range[] = { 1.0, 5.0 } ; const float* histRange = { range }; bool uniform = true; bool accumulate = false; Mat hist; calcHist( &histogram, 1, 0, Mat(), hist, 1, &histSize, &histRange, uniform, accumulate ); cout<<"hist:"<

Output: hist:[2;2;1;1]
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