How to multiply 8*8 data sets elementwise?
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I want multiply with 1.02 each and every element so new table will be 8*8. How one can use for loop?
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David Fletcher
2021-5-24
If you're just multiplying by the scaler of 1.02 then
Qxxepoch1{:,:}*1.02
will do what you want without a loop
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vimal kumar chawda
2021-5-24
vimal kumar chawda
2021-5-24
Use {} if your data is inside a cell array to reach into the cell to extract the data (like cracking an eggshell to reach the egg inside.) Use () if your data is in a matrix to extract individual elements (like picking an M&M from a bowl of candy.)
M = [1 2 3; 4 5 6; 7 8 9];
C = {M};
2*M(3, 1) % 2*7 = 14
2*C{1} % 2 times the matrix M
% 2 times the element in location (3, 1) in the matrix stored in the first cell of C
2*C{1}(3, 1)
David Fletcher
2021-5-24
Just to expand on the information above - your original data was stored in a table. You can't apply the times (*) operator directly on the table, so writing
Qxxepoch1{:,:}
extracts all the data in the table into a matrix. Holding the data in a matrix allows you to apply the times operator to multiply the elements by 1.02. However, as mentioned above, to access the data in a matrix you use the normal indexing with parenthesis () - using brace {} indexing on a matrix will cause the error you experienced. It can be confusing - you just need to be aware of what your data is stored in, and use the appropriate indexing for the task.
vimal kumar chawda
2021-5-28
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