how to convert table to cell to acess data?

Question

ramya 2024-3-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2090266-how-to-convert-table-to-cell-to-acess-data

评论： the cyclist 2024-3-5

filename = 'Book11.csv';
M = readtable(filename);
a=M(:,3);%phi
b=90;
f=unique(M(:,1)); %freq
rcs=M(:,4);
ys = smooth(rcs,10);
Error using ()
Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable subscript, as in t(rows,vars). To select variables, use t(:,i) or for one variable t.(i). To select rows, use t(i,:).

Error in smooth (line 91)
    y = y(:);
plot(a,rcs,'k'); hold on; grid on
plot(a,ys,'r')
legend('original','average')

i have to import file then plot on y axis wrt rcs and x axis wrt phi for constant b for all frequencies before plotting i have smooth the data of rcs also

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Answer 1

the cyclist 2024-3-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2090266-how-to-convert-table-to-cell-to-acess-data#answer_1420921

编辑：the cyclist 2024-3-4

在 MATLAB Online 中打开

Book11.csv

The syntax

rcs=M(:,4)

will give a one-column table.

The syntax

rcs=M{:,4}

will give a column of data of the class that is stored in the table. I think that's what you want.

filename = 'Book11.csv';

M = readtable(filename);

a=M{:,3};%phi

b=90;

f=unique(M(:,1)); %freq

rcs=M{:,4};

ys = smooth(rcs,10);

plot(a,rcs,'k'); hold on; grid on

plot(a,ys,'r')

legend('original','average')

(I have not tried to solve why you don't get the graph you expected here.)

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prabhu singh 2024-3-5

I hv to take 50% percentile of rcs and smooth the data by using windowsize and slideangle.

the cyclist 2024-3-5

OK. We've solved your problem of how to access table data. I suggest you accept this answer, and post a new question specifically on the data you have, and how to smooth it.

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