MATLAB: How to add new row to matrix of variable columns

additioncolumnrowrow namevariable namesvector

I have a matrix created with multiple column vectors and am looking for a way to add a row vector to the matrix to include the variable names in the matrix. Not sure how to add a row to a column vector matrix.

Best Answer

You can't add variable names to matrices. Matrices can only contain numbers.

However, you could use a table which are designed explicitly for that.

Related Solutions

MATLAB: New column

I think this does what you want:

Price = randi(10,20,1)
buy = [true;diff(Price)>=0];
idx = find(~diff(Price));
buy(idx+1) = buy(idx);
[Price,buy]

I'm using a logical array buy that is true for "buy" and false for "sell". You could use a nominal array (if you have Statistics Toolbox) to assign arbitrary labels (ie "buy" and "sell"), but logical probably does what you want the easiest.

EDIT: if you really want a column of strings (for output purposes), this will do it:

buysell = cellstr(repmat('Sell',size(Price)));
buysell(buy) = {'Buy'}

MATLAB: Matrix row/column augmentation

You can use F=a*(ones(20,20)).

Best Answer

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MATLAB: New column

MATLAB: Matrix row/column augmentation

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