emr

R: replacing double escaped text

I'm gluing together a number of system calls using the Amazon Elastic Map Reduce command line tools. These commands return JSON text which has already been (partially?) escaped. Then when the system call turns it into an R text object (intern=T) it appears to get escaped again. I need to clean this up so it will parse with the rjson pack...

Simple robust error correction for transmission of ascii over serial (RS485)

I have a very low speed data connection over serial (RS485): 9600 baud actual data transmission rate is about 25% of that. The serial line is going through an area of extremely high EMR. Peak fluctuations can reach 3000 KV. I am not in the position (yet) to force a change in the physical medium, but could easily offer to put in a simpl...