MATLAB: Convert 1×1 cell to 1×1 double

convertnanstr2doublestructtable

Hi,
I am trying to convert a 1×1 cell to 1×1 double using str2double. An explanation is as follows:
M.c = str2double(T(test, x))
M: 1×1 struct with a field c
T: table
test: row number in T
x: column number in T
Matlab version: R2020b
PS: The individual values in (test,x) are of type double but since they are inside a table they are converted to 1×1 cell type and therefore I have to convert it to 1×1 double array.
Problem: I am getting 'NaN' when I try to set the value of M.c. I am expecting a double to be set there since the program is structured in that way.
Thank you.

Best Answer

Hi, depending on the contents in the cell array, here are two examples. Mind the indexing into cell, you should use curly brackets to get the "contents" of the cell. 
% Example for a character array with single element
a = '3.4';
str2num(a)
ans =
    3.4000
str2double(a)
ans =
    3.4000
% Example for character array with multiple elements
a ='3.4, 5.2';
str2double(a)
ans =
   NaN
str2num(a)
ans =
    3.4000    5.2000
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