visibility range of histogram

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Sajid Afaque 2020-6-12

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评论： Walter Roberson 2020-6-12

hello i have 2 questions now,

in below histogram how do i limit the range of x-axis to around 200.(here i am also specifying the number of bins)

2. in below histogram my median value in around 24,is their any possibility where i can indicate this value in the x-axis prior to 25.i used text but i am having difficulties in placing it in the right position(i.e. at median value)

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Answer 1

Abhivandan Pandey 2020-6-12

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Hi Sajid,

For your 1st query, you can make use of the xlim function to set the x-axis limits for the histogram as shown below.

histogram(data);
xlim([0, 200]);

For your 2nd query, you can use xticks and xticklabels as below,

xticks([25])
xticklabels({'median = 25'});

I hope this helps.

Regards,

Abhivandan

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Sajid Afaque 2020-6-12

2nd answer

for xticks i am getting below error

Undefined function 'xtick' for input arguments of type 'double'.

Abhivandan Pandey 2020-6-12

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The xticks function was introduced in R2016b. In earlier releases you must use the code below (this code also works on newer releases)..

set(gca,'XTick',[25])
set(gca,'xticklabel',({'median = 25'}))

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Answer 2

Walter Roberson 2020-6-12

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Instead of using 200 bins, you can specify the bin edges, such as

UpperBound = 200;
NumBins = 100;
%histogram did not exist in R2013b
hist(data, linspace(0,UpperBound,NumBins));
%draw reference line at median
med = median(data);
YL = get(gca, 'YLim');
hold on
plot([med;med], YL, 'r');
xlabel(sprintf('x, median = %g', med))

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Sajid Afaque 2020-6-12

编辑：Sajid Afaque 2020-6-12

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hello walter,

actually i need to plot hist for full range . that is my data is from 0 to 931(x-axis range) and for this whole range i take around 495 bins.

now for the obtained hist using

hist(data,495)

i need to limit the visibility range.(say x-axis from 0 to 200).i dont want to re-classify bins

Walter Roberson 2020-6-12

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 i need to plot hist for full range
 i need to limit the visibility range

Is it correct that you need to plot everything but only put 0 to 200 up in the visible window, and that the reason for that is that you want the user to be able to use the plot tools to be able to zoom or pan to see more of the plot?

If the user is not going to need to see anything after 200 then there is no point in including those bins in the histogram calculation.

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