Why is the x-axis scale different from what I specified in the code?

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Matteo 2014-5-10

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https://ww2.mathworks.cn/matlabcentral/answers/129102-why-is-the-x-axis-scale-different-from-what-i-specified-in-the-code

评论： Star Strider 2014-5-10

采纳的回答： Star Strider

valori2.txt

在 MATLAB Online 中打开

My problem is about the plot of this code. I attached the text file I have to use;I want to plot the hour(2nd column) on the x-axes and the value(3rd column) on the y-axis. But when I plotted them the scale on x-axis is different from the original data: His range is from 00:00:17 to 00:01:17 instead of 05:00:07 .Why? Could someone help me? Thank you very much

 % YourFilePath = 'C:\Matlab\valori2.txt';
fid = fopen(YourFilePath ,'rt');
Datafile = textscan(fid,'%s%s%s%s%s','Headerlines',2);
    Value = Datafile{3};
    Value = cellfun(@(x) textscan(x,'%s','Delimiter', ' ')',Value ,'UniformOutput',false);
    Y = vertcat(Value{:});
    X = cellfun(@transpose,Y,'UniformOutput',false);
    Z = cellfun(@str2double,X,'UniformOutput',false);
    Value1=cell2mat(Z);
Time (:,1)= Datafile{2};
Time1=cell2mat(Time);
fclose(fid);
plot(Value1,'*')
set(gca,'xticklabel',{Time1})

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采纳的回答

Star Strider 2014-5-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/129102-why-is-the-x-axis-scale-different-from-what-i-specified-in-the-code#answer_136318

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Replace:

set(gca,'xticklabel',{Time1})

with:

xt = get(gca, 'XTick')
set(gca, 'xtick',xt(1:end-1), 'xticklabel',Time1(xt(1:end-1)+1,:))

and it should plot as you want.

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Matteo 2014-5-10

Thank you very much!Now it's perfect

Star Strider 2014-5-10

My pleasure!

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