Labeling Axises, YTick spacing, maximum and minimum labeling

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Answer 1

[dpb]

>> [mx,i]=max(zc(:))
mx =
  154.5315
i =
       10403
>> [imx,jmx]=ind2sub(size(zc),i)
imx =
   101
jmx =
   103
>> zc(imx,jmx)
ans =
  154.5315
>> 

Your ticklabel vector must have as many elements in it as there are tick values...set the ytick vector to the number/location wanted to avoid the automagic resizing.