VLookup Multiple Conditions if statements

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James
James 2020-3-27
编辑： Adam Danz 2020-3-31
Hi
I was wanting to modify this code to perform a VLookup on 2 columns and return the element of one of the correspoding column element in the same row?
Can someone please assist me on the if statements for this function?
Here is a function I found on Mathworks that I would like to modify: So instead of having one lookup column I need 2.
https://www.mathworks.com/matlabcentral/fileexchange/29233-vlookup-similar-to-ms-excel-function
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James
James 2020-3-30
Hi Adam,
The array could be either a cell array or table. Is this a problem for coding?
Thanks so much.

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Adam Danz
Adam Danz 2020-3-27
编辑：Adam Danz 2020-3-30
No need for a function.
See inline comments for details.
Matrices
% Define matrix
m = randi(3,2000,5);
% Define search variables
lookupValues = [1,3]; % values to search for in the two columns
lookupColumns = [2,3]; % two column numbers to search in
returnColumn = 1; % the column number used to return the output
% Compute outputs (same variable names as the function you shared)
index = ismember(m(:,lookupColumns), lookupValues, 'rows');
content = m(index, returnColumn);
Cell arrays
Look up the value of 2 in column 1 and 'Day' in column 2:
idx = [C{:,1}]'==2 & strcmpi(C(:,2), 'Day');
C(idx,3) % or [C{idx, 3}]
Tables
Look up the value of 2 in column 1 and 'Day' in column 2:
idx = [T{:,1}]==2 & strcmpi([T{:,2}], 'Day');
T(idx,3) % or [T{idx, 3}]
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James
James 2020-3-31
Hi Adam,
Could you help me with plotting?
Adam Danz
Adam Danz 2020-3-31
编辑：Adam Danz 2020-3-31
What are you plotting? If it's a quick question with a straightforward answer, I can help you here. If the question is more in depth, you may want to write a new question and leave a comment with the URL.

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