how to convert table to cell to acess data?

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

Answer 1

[the cyclist]

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.)

[prabhu singh]

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

[the cyclist]

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.