how to plot from CSV files?

2024 5 19
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更新时间：2024 5 20
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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!!

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Star Strider
Star Strider 2024-5-19
Ran in:

0 个投票

Ran in:
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.
.

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Lilya
Lilya 2024-5-20
thank you very much!! it works
Star Strider
Star Strider 2024-5-20
As always, my pleasure!

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