How to write datetime in a plot?

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Diego 2014-1-31

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https://ww2.mathworks.cn/matlabcentral/answers/114345-how-to-write-datetime-in-a-plot

评论： Mischa Kim 2014-2-13

采纳的回答： Mischa Kim

I want to read a file.csv but my problem is that i don't know how can I represent in a plot the hour.

My goal is to represent a number as a datetime but I don't Know if it's possible to convert it as in the next example:

131212 --> HH:MM:SS --> 13:12:12

And then put this number in that format in an x-axis in a plot.

Thanks!!!

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Mischa Kim 2014-1-31

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https://ww2.mathworks.cn/matlabcentral/answers/114345-how-to-write-datetime-in-a-plot#answer_122795

编辑：Mischa Kim 2014-1-31

在 MATLAB Online 中打开

This should do:

T0    = '131212';
T0Vec = [2000,0,0,str2double(T0(1:2)),str2double(T0(3:4)),str2double(T0(5:6))];
T0Str = datestr(T0Vec,'HH:MM:SS');

Once you have the string you can put it on the xlabel for your plot or add it as a text element.

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Diego 2014-1-31

在 MATLAB Online 中打开

Thanks for your response Mischa! Your code its works but If I prove my code in your code it doesn't works!

I believe that I don't Know how to pass the time! If you can help me I would be gratefully!

I have this code:

TIME_STAMP (100x1 cell) is like that:

TIME_STAMP 2014/01/16 13:12:12 2014/01/16 13:12:13 2014/01/16 13:12:16 2014/01/16 13:12:17 ...

I only have to work with the time and not with the date.

for i=1:length(TIME_STAMP) p=TIME_STAMP{i}(12); %first value of H f=TIME_STAMP{i}(13); %second value of H q=TIME_STAMP{i}(15); %first value of M r=TIME_STAMP{i}(16); %second value of M s=TIME_STAMP{i}(18); %first value of S t=TIME_STAMP{i}(19); %second value of S

    %hours(i)=str2double(strcat(p,f));
    %min(i)=str2double(strcat(q,r));
    %seconds(i)=str2double(strcat(s,t));
    time(i)=str2double(strcat(p,f,q,r,s,t));
    %T0Vec = [2000,0,0,strcat(hours(i),min(i),seconds)];
    T0Vec(i) = [2000,0,0,str2double(strcat(p,f)),str2double(strcat(q,r)),str2double(strcat(s,t))];
    T0Str(i) = datestr(T0Vec(i),'HH:MM:SS');
end

- time (1x100 double) is like that:

131212 131213 131216 131217 ...

The result of my code:

Error: In an assignment A(I) = B, the number of elements in B and I must be the same.

I don't Know how to pass the time! If you can help me I would be gratefully! Once I have the string with the time I want to put into the x label. Thanks!!!

Diego 2014-2-12

Yes I wanna do this! I'll try to do it!

I apologize for the confusion, I want to say Mischa! I was writing so quickly...!

Mischa Kim 2014-2-13

Hello Diego. Good to see you again. Would you mind opening another question? It is not really on the topic of your original question, which would make it challening to find for other users. Plus this thread is getting kind of long.

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