Gregor Isack questions

• How to get the index of $Matches index that satisfy certain criteria?
• Batch: Pipe command output to variable and compare
• Extract elements given 2D matrix of column indices per row from a 2D matrix in MATLAB
• How to dynamically reshape matrix block-wise? [duplicate]
• How to 'copy' matrix without creating a temporary matrix in memory that caused memory overflow?

Gregor Isack answers