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how to plot from CSV files?

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Lilya
Lilya on 19 May 2024
Commented: Star Strider on 20 May 2024
Hi all,
I have some data as CSV and want to plot the time (col. 1,2) in x-axis with temperature (col. 3) in y-axis (screenshot)
how to :
  • access the data
  • plot the data
thanks!!

Accepted Answer

Star Strider
Star Strider on 19 May 2024
It would help to have your data rather than an image of it.
In the interim, try something like this —
imshow(imread('Screen Shot 20....42.20 PM.png'))
% T1 = readtable('YourFile.csv')
T1 = table(['16/02/2024';'16/02/2024'], ["11:37:39AM"; "11:37:40AM"], [11.9420; 11.9440], 'VariableNames',{'LogInterval','VarName2','VarName3'})
T1 = 2x3 table
LogInterval VarName2 VarName3 ___________ ____________ ________ 16/02/2024 "11:37:39AM" 11.942 16/02/2024 "11:37:40AM" 11.944
LogTime = datetime(T1.LogInterval, 'InputFormat','dd/MM/yyyy') + timeofday(datetime(T1.VarName2, 'InputFormat','hh:mm:ssa'))
LogTime = 2x1 datetime array
16-Feb-2024 11:37:39 16-Feb-2024 11:37:40
LogTime.Format = 'yyyy/MM/dd HH:mm:ss'
LogTime = 2x1 datetime array
2024/02/16 11:37:39 2024/02/16 11:37:40
T1 = addvars(T1, LogTime, 'Before',1)
T1 = 2x4 table
LogTime LogInterval VarName2 VarName3 ___________________ ___________ ____________ ________ 2024/02/16 11:37:39 16/02/2024 "11:37:39AM" 11.942 2024/02/16 11:37:40 16/02/2024 "11:37:40AM" 11.944
T1 = removevars(T1,[2 3])
T1 = 2x2 table
LogTime VarName3 ___________________ ________ 2024/02/16 11:37:39 11.942 2024/02/16 11:37:40 11.944
VN = T1.Properties.VariableNames;
figure
plot(T1.LogTime, T1.VarName3)
grid
xlabel(VN{1})
ylabel(VN{2})
That should work.
.
  2 Comments
Lilya
Lilya on 20 May 2024
thank you very much!! it works
Star Strider
Star Strider on 20 May 2024
As always, my pleasure!

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