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In Matlab, after plotting a figure then I select a range of area and replot again

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Teng Cheng Kang
Teng Cheng Kang on 23 Oct 2020
Commented: Teng Cheng Kang on 27 Oct 2020 at 3:10
Here is my program and figure, and I want to select a range of area and replot again finally calculate RMS
num1 = xlsread('2.1mm.csv','A2:A999999');
num2 = xlsread('2.1mm.csv','2.1mm','A3');
num3=(num1-num2)*86400;
num4 = xlsread('2.1mm.csv','c2:c999999');
plot(num3,num4);
set(gca, 'Fontname', 'Times New Roman','FontSize',24);
xlabel('time(sec)');
ylabel('g');
set(get(gca,'ylabel'),'rotation',0)
title('Spindle');
Sorry for the first consultation

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Accepted Answer

KSSV
KSSV on 23 Oct 2020
Yes you can very much do it....
If you have limits/ range for x-axis; you can limit your range in the existing plot using xlim, ylim, axis.
If you want to plot again and you want to restrict the range with data itself. Let val0 and val1 be your x-axis ranges.
idx = num3 >= val0 && num3 <= val1 ; % get indices
num3 = num3(idx) ;
num4 = num4(idx) ;
plot(num3,num4)

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