Read modify and replace

This user-fun reads the value of the "freq" field, multiplies it by 2 and replace the old value.

The user-fun patch must al less have 2 inlets and 1 outlet and these are always the same.

• Input # 0 is the matrix of the OMChroma class,
• Input # 1 pass the number of the rows which is read by the user-fun. Remember the number go from 0 to n-1 rows,
• Output # 0 to connect the lambda patch to the OMChroma class.

All the other objects realize the algorithm and obviously are different in each patch. In this case :

• The function get-comp gets the component one by one in sequential order,
• The function comp-field with 2 inlets returns the value of the field corresponding to the line identiefier (2nd inlet). Here it is "freq",
• The function OM* performs the calculus,
• The function comp-field with 3 inlets assigns the value riceived in the 3rd inlet to the field corresponding to the line identiefier.

This user-fun reads the value of the "freq" field, multiplies it by a random number between the minimum and maximum value given by the two supplementary inlets of the user-fun patch and replace the old value.