Histogram using MAX not frequency values within a Bin?

Hi, I can't seem to find anywhere how to make a histogram using the max values within a binwidth (like a bar graph) instead everything on the internet appears to show frequency histogram.

Thanks,

Regards, Tyson.

[Stephen23]

"Histogram using MAX not frequency values within a Bin?"

The reason why you will not find anything on the internet is because what you are searching for makes no sense: a histogram is by definition a bar graph of the frequencies, so searching for a histogram using max is going to find you as many results as searching for a monotonically increasing sinewave or a circle with five corners.

Histogram, noun:

a graph of a frequency distribution in which rectangles with bases on the horizontal axis are given widths equal to the class intervals and heights equal to the corresponding frequencies.

a representation of a frequency distribution by means of rectangles whose widths represent class intervals and whose areas are proportional to the corresponding frequencies

a statistical graph that represents the frequency of values of a quantity by vertical rectangles of varying heights

Are you really asking about how to create a bar chart with binned data?

Answer 1

[Stephen23]

One way would be to assign the values to groups using bsxfun and then use accumarray to get the maximum of each group:

>> x = [-5,-4,-3,-2,-1,0,1,2,3,4,5,6];
>> y = [ 6, 5, 4, 3, 1,1,1,3,4,5,6,7];
>> bw = 2;
>> bx = x(1):bw:x(end)+bw;
>> cn = sum(bsxfun(@le,bx(:),x),1);
>> mx = accumarray(cn(:),y(:),[],@max)
mx =
     6
     4
     1
     3
     5
     7
>> bar(mx)

giving:

Answer 2

[Image Analyst]

Are you looking for the bar() function instead of histogram()?