Create an RGBA histogram of a cat using Imagemagick

How do I create a histogram of this cat image?

Create a new bash script named create-histogram.sh.

# create-histogram.sh #!/bin/bash 

Provide a ".png" file

echo "PNG please ~~~~~" read PNG 

Remove ".png" from PNG

SPLICE=${PNG%????} 

Create the EXPORTFILE as ".txt"

EXPORTFILE="${SPLICE}.txt" echo $EXPORTFILE 

Export a histogram ".txt" file based on the ".png"

convert $PNG -format %c histogram:info:- > $EXPORTFILE 

The exported histogram will look something like this ...

And a here is a clip of the workflow.