topic Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder in Discussions

How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

Achim_T — Tue, 04 Sep 2018 07:22:48 GMT

Is it possible to create a bar-mekko chart in JMP? see e.g.

https://kb.tableau.com/articles/howto/create-a-variable-width-bar-chart-aka-cascade-chart

I can create a bar chart with categories on the X-axis and Numerical on the Y-axis, and sort ascending. Then, intuitively, dragging another numerical column to the "Size" field should create such a chart (Size = widths of the bars in the chart?) but nothing happens if I do that. I can only color the bars instead, i.e. dragging to the "Color" field in the Graph builder.

Thanks in advance for any help.

Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

MikeD_Anderson — Tue, 04 Sep 2018 14:34:55 GMT

I'd try a packed bar chart - it's one of the options for bar charts in JMP 14.

https://community.jmp.com/t5/JMP-Blog/Introducing-packed-bars-a-new-chart-form/ba-p/39972

Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

Achim_T — Tue, 04 Sep 2018 15:34:01 GMT

Thanks Mike, I had looked at that but this is not really what I intend here. Also, packed bars get very confusing because unrelated categories are mixed. The variable width bar charts are very common in the mining / oil & gas world, e.g. production cost on the y-axis, mine/well name as category on the x-axis, and mine/well production size as bar width. Would be cool if this could be added in the graph builder at some point (like I described via dragging a column on the size field with a bar chart).

Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

Dan_Obermiller — Tue, 04 Sep 2018 19:48:39 GMT

Two options that I can think of (neither is a bar chart) that would get you close are:

1) don't use bars. Stick with a scatterplot and set the size of the point to be the production size. That would give you something like this:

2) use Fit Y by X, put the Production Size in as a Frequency variable (Fit Y by X has an X-axis proportional default setting). That gives you something like this:

You could play around with some additional options to try and make them look a bit better.

Of course you could always write a script to do this.

Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

Achim_T — Wed, 05 Sep 2018 06:23:18 GMT

Thanks Dan, I will try the scripting and the suggested alternatives.

Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

gzmorgan0 — Wed, 05 Sep 2018 10:42:06 GMT

Attached is a very simple script that builds on Dan's suggestion. It shows how to make bars instead of points. I tested it on JMP 12, 13 and 14.

If I were building an application, I'd create a summary table based upon user input and likely build the graph using Shape Seg with rowstates associated with the table.

Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

gzmorgan0 — Wed, 05 Sep 2018 10:49:55 GMT

Oh, one more suggestion. Mosaic plots scale by N/Weight. You might want to resarch them in the Scripting Index.

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
obj = Distribution( Column( :Age ) );
obj << Mosaic Plot( 1 );

Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

Jeff_Perkinson — Mon, 20 Apr 2020 14:43:41 GMT

Starting with JMP 16 the bars element will support the size role to allow for this kind of chart.

Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

ThomasBBB — Sat, 08 Jun 2024 13:14:37 GMT

In JMP17, Size is an element in the bar chart of the Chart Builder. However, assigning a quantitative column to this element does not change the bar widths.

Below is an example with state population data. The intention is for the bar width to be proprotional to the state population. That is similar to what user Achim_T wanted to do.

Re: How to create a bar-mekko chart (variable width bar chart) in JMP / Graph Builder

ThomasBBB — Sat, 08 Jun 2024 13:26:27 GMT

I found the solution.

To get this output, I had to control (or right) click the x axis to bring up options. Then choose Size by..., then Other, then the column I wanted to use.

I'm putting the solution here so that I will find it when I forget next time. Perhaps others will too.

Dropping the intended variable into the size element on the right, as I did above, does not work.