How take value (column number) from one data set (1x15145 double) and find value corresponding to same row and column associated with another data set (1x4579 double)

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Sag 2016-1-17

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评论： Walter Roberson 2016-1-17

I have a value with specific row and column number from one data set s (1x15145 double), and I want to extract value corresponding to same row column number from another data set Time (1x4579 double)

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Walter Roberson 2016-1-17

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Time(row_from_s, column_from_s)

Though with vectors you would normally only use one index.

Example:

[minval, minidx] = min(s);
if minidx > length(Time)
  error('Time is too short to get the corresponding position of s');
end
t = Time(minidx);

Actually I want multiple values and then process them all for further processing. I want multiple values from Time. Instead of using row and column numbers Time(row_from_s, column_from_s), can I use A?

Walter Roberson 2016-1-17

The result of strfind() is a set of linear indices, not a set of rows and columns. You can use the linear indices to index the vector Time.

You would need to take more care if you were using 2D or multidimensional arrays of different sizes and needed matching row and column numbers, but when you use vectors (or arrays in which all of the dimensions were equal except perhaps the last dimension) then you do not need to worry about that, linear indices are fine. Just don't translate to row and column numbers if you have multiple values.

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