[R] replace zero in a matrix using random numbers

Yuan Chun Ding ycd|ng @end|ng |rom coh@org
Fri Jan 8 23:33:13 CET 2021

Hi R users,

I am analyzing miRNA sequence data for a special network analysis, I need to replace zero values in a matrix as random numbers with mean of 1 and standard deviation of 0.1.

er.miRCounts[er.miRCounts==0] <- rnorm(1,mean=1, sd=0.1);

this code made all zero values as 1.13, not random numbers across different zero values.  If all zero values in one row are replaced by the same 1.13,  then sd in that row is zero, causing other problem in the following calculation.

Can you help me?

Thank you,

Yuan chun Ding


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