Error while running the gmt basemap

Q&A
1

dem=“dem_dsamp.grd”
gps=“GPS.dat”
RR=‘gmt grdinfo -I- $dem’
output=“demo”
format=“png”

gmt begin $output $format
gmt basemap -JM6 $RR -Ba1f0.5
gmt end show

While running the above code I’m getting below error, please check it once.

basemap [ERROR]: Unrecognized option -<
basemap [ERROR]: Unrecognized option -<
basemap [ERROR]: Unrecognized option -I
basemap [ERROR]: Unrecognized option -<
basemap [ERROR]: Syntax error: Must specify -R option

2

You need back-ticks, not single quotes. Better though to use this syntax

RR=$(gmt grdinfo -I- $dem)