## How can I cancel coloumns of an array/table using a user prompt and then plot the data?

Lala0099

### Lala0099 (view profile)

님이 질문을 제출함. 9 Nov 2019 11:54
최근 활동 Anmol Dhiman

### Anmol Dhiman (view profile)

님이 답변함. 13 Nov 2019 9:32
Hey Everyone,
I have several data points. So basically i exported my data in excel sheets. I have 33 columns, and 30.000+rows. (i could not attach it to this question).
I want to use the last 720 points only. I managed to create a code for certain channels.
But I would like to have a user input,asking which channels the person want to use. Eg. 1,2,3 out of the 15 channels available, and then import those in a separate array and plot them in a scatter graph. But i don`t know how to create a code that allows it to be any number of channels and then plot them as well on the same graph. I have attached what I have already.
The time coloumns I want to cancel and the date coloumn too.
I dont know if i managed to ask this question in a sensible way. So basicaly i would like to get a user input . Eg. "which channels do you want to use?"
User: "1,2,6" or "1,14"
and then the program save those in a separate array and then plots the points the average of the selected coloumns on the same scatter graph. Thank you for all the help!

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Anmol Dhiman

### Anmol Dhiman (view profile)

님의 답변 13 Nov 2019 9:32

As per my understanding of the attached code, to get multiple values in array, use ‘[ ]’ while entering the inputs using prompt as shown below.
prompt = 'Enter the values\n';
x = input(prompt);
x = unique(x); % to store unique values
disp(x)
% OutPut
Enter the values
[1 1 3 4]
1 3 4
To plot all the channels simultaneously, try the following in your code
x = -2:0;
plot(T.CH_14);
xlim([-2 0])
ylim([-0.4 0.4])
hold on % To store scatter plots simultaneously
for i =1: numel(x)
p = x(i);
if p>1 && p<=14 % check if p lies in the range of the channels
% write the if statements here from measurement_reader.m
end
end

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