Creating a for loop that goes through 12 month data in sets of 2

Question

Sebastian Sunny 2021-12-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1602205-creating-a-for-loop-that-goes-through-12-month-data-in-sets-of-2

编辑： Sebastian Sunny 2021-12-10

Hi guys,

Ive been trying to implement a for-loop to plot graphs from a set data with each plot having 2 months in it, so the first plot would have all values from jan to feb and 2nd would have all values from march till april.

I also have been to trying to make the sets of data into 2 lines where the first is the plots for data constiting of jan to jun and the second line being data from jul to dec.

Thank you, any guidance would be appreciated

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Answer 1

Eric Sofen 2021-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/1602205-creating-a-for-loop-that-goes-through-12-month-data-in-sets-of-2#answer_846970

在 MATLAB Online 中打开

T = readtable('Levenmouth7MWTurbineData2019.csv') ;
T.month = month(t.disc_TimeStamp);
tiledlayout(3,2)
for m = 1:2:12
    monthMatch = any(T.month == [m m+1],2);
    % or 
    % monthMatch = (T.month == m | T.month == m+1);
    Tplot = T(monthMatch, :);
    % polar plot
    nexttile
    polar(Tplot.mean_NacelleOrientation_Deg, Tplot.mean_WindSpeed_mps,'.')
end

This approach assumes you've just got one year of data (otherwise, you'll combine Jan-Feb 2019 and Jan-Feb 2020 into one plot). Then you would need multiple grouping variables - month and year.

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Answer 2

KSSV 2021-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/1602205-creating-a-for-loop-that-goes-through-12-month-data-in-sets-of-2#answer_846750

在 MATLAB Online 中打开

You can proceed like below.

T = readtable('Levenmouth7MWTurbineData2019.csv') ;
thedates = datevec(T.(1)) ; 
% plot for Jan and Feb by getting indices of them 
idx = thedates(:,2)==1 | thedates(:,2)==2 ; 
% plot third column
plot(T.(1)(idx),T.(3)(idx))