search for: 1000x21

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2012 Jun 11
2
replacing values of matrix with random values of another dataframe
Hello, I'm having trouble performing a certain function within R and I was hoping someone might be able to help. I have a matrix (1000x21) that contains whole-number values ranging from 1-7 and I want to replace all entries within this matrix that have a value of 1 with a random number contained within a different dataframe that has 21 rows,1000 columns. I've tried using the if/else function, but this always seems to return a li...