Why is it not drawing a graph?

Question

linux

I'm trying to draw a graph of a certain value in skates:
${execgraph 100 "sensors -u | grep -A 0 'temp2_input' | cut -c 15-17"}
as a result, just an empty box without any graphs.
Here is the result of executing sensors -u | grep -A 0 'temp2_input' | cut -c 15-17
50
That is, the values ​​are obtained, but the graph does not draw.

Answer 1

For periodic polling, the following command is provided execigraph:

${execigraph 500 "sensors -u | grep -A 0 'temp2_input' | cut -c 15-17" -t}