Ideal Data Format for "Size" Data to Use Histogram Plot

[samwyss]

Hi All,

In a simulation, I have a collection of "items" that are represented by their "size". The number of these items and their corresponding size changes as a function of the time step. My goal is to import these into VisIt to view them as a Histogram.

I have tried representing this data in .csv files (attached below for reference in item_dist.zip) as well as shoehorning it into a Pointvar1 that is associated with an index Pointmesh as it is required when using the .silo format. Neither of these options allow me to view these data as a Histogram nor apply the DataBinning operator which leads me to believe I am representing this data incorrectly as it can only currently be viewed as a Curve.

Is there a better way I should be representing this data to view as a Histogram in VisIt or is there something I can do to view the current format as a a Histogram?

item_dist.zip

Thanks!
Sam

[markcmiller86]

I sympathize with your troubles. I tried something very simple...convert your itemsXXX.csv files to a simple .curve file. That works but the histogram plot is grayed out for curves (and I can't explain why that is). So, I instead pivoted to create a .xyz file instead. That works.

Here is script to produce a .xyz file from one of your .csv files...

#!/bin/bash

# Path to the input file
input_file=$1

# Check if the file exists
if [ ! -f "$input_file" ]; then
    echo "Error: File does not exist."
    exit 1
fi

# Read lines from the file
i=0
echo "x y z items"
while IFS= read -r line
do
    if [[ $i -eq 0 ]]; then
        ((i++))
        continue
    fi
    echo $i $i $i $line
    ((i++))
done < "$input_file"

Then run like ./foo.sh itemsxxx.csv > itemsxxx.xyz

Then open itemsxxx.xyz using PlainText reader and options

• check box indicating first row has variable names
• set x coord column to 0
• set y coord column to 1
• set z coord column to 2

and do a histogram plot of items variable.

[markcmiller86]

Once you've set the PlainText read options once in a session, they will remain in effect for that whole session so you should be able to convert all your .csv files to .xyz files and then operate on the time series. If you wanna keep those PlainText options across VisIt sessions, then do a Save Settings.

[samwyss]

Hi @markcmiller86 ,

I apologize for the delayed response and thank you very much for the help! I will mark your post as the answer. Thanks for all the great work you and your team do!

Sam