Ubuntu :: Record Memory Usage Of Program?

Is there a way I can start a program and then record a log of how much memory it's using at a specific interval until the program ends?

I've tried writing a shell script but get the error: ./apps/mem-test.sh: line 4: [: too many arguments

Here's the non-working script:

Code:
$HOME/apps/ImageMagick/bin/convert -limit memory 64 -limit map 128 $HOME/SSI/davidkennardphotography/Img-Orig/95-Pole-Bank.jpg -set option:filter:filter Lanczos -set option:filter:blur 0.8 -resize 1024x720 $HOME/resizedImage.jpg &
GOODY="ps -p $! -o pid,%cpu,rss,cmd | grep convert >>test.txt"

[Code]....