hi does anyone know how to create a graph with a logarithmic scale on the "Y" axis? I want to make an enthalpy vs pressure diagram, has anyone already made a Mollier diagram? constant entropy lines are costing me a lot of work. Thanks for your attention

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PH.sm (214 KiB) downloaded 43 time(s).

You can do with the Zedgraph plugin

sergio

PH_sergio.sm (246 KiB) downloaded 89 time(s).

Maxima plug-in should work too.

Integrated 2D plot should work too.
Same can be said for XY-Plot plugin.
With a little trick of course.

logarithmic_plot.sm (13 KiB) downloaded 79 time(s).

Wrote

You can do with the Zedgraph plugin

sergio

PH_sergio.sm (246 KiB) downloaded 89 time(s).

Sergio, thank you very much for answering

The logarithmic scale worked perfectly, however, the lines that it draws are somewhat wavy, as if there is noise and they are separated,
is there any way that the line is smoother and more united? Also, when I use ZG, how can I name the lines? I entered all the tempperature
and entropy data manually

thank you very much for your attention :d
My English is not very good, I hope you can understand me





file
PH R22.sm (181 KiB) downloaded 25 time(s).

Wrote

Integrated 2D plot should work too.
Same can be said for XY-Plot plugin.
With a little trick of course.

logarithmic_plot.sm (13 KiB) downloaded 79 time(s).

Thanks for answering, your method is very helpful.
Do you know how I can enter text for the graph lines? I entered all the temperature and entropy values manually,
I would like the text to be on the lines or on one side of the line without having to enter them as a text region.

thanks for your attention
I don't write in English, I hope you understand me



PH R22 Q.sm (179 KiB) downloaded 42 time(s).

You can view all at once on collected Mollier.

PH R22 Q Mollier.sm (61 KiB) downloaded 47 time(s).

Wrote

Thanks for answering, your method is very helpful.
Do you know how I can enter text for the graph lines? I entered all the temperature and entropy values manually,
I would like the text to be on the lines or on one side of the line without having to enter them as a text region.

thanks for your attention
I don't write in English, I hope you understand me

In 2D-plot and XY-plot there is a method to enter text or some marks into the graph.
Don't have any idea if this works with Zed graph.
I don't have it and I have no intention to install it.
Below you can see a simple demonstrated answer to your question.
There is also a lot of detailed information for plotting in Reference book.

Regards

logarithmic_plot_withtext.sm (32 KiB) downloaded 73 time(s).

Wrote

has anyone already made a Mollier diagram? constant entropy lines are costing me a lot of work. Thanks for your attention

An horrible task for the first model from you data.
The principle is quite involved but works.
M8, M9, M10 do NOT cinterp ... confirmed Mathcad
Quadratic acceptable M9 ... M8 poor ... M10 OK
More work to conclude is needed ... as is reconciliation.
the FREAK is not done
Cheers ... Jean

Project Mollier IDX part.sm (163 KiB) downloaded 43 time(s).

The all difficulty results from poor/unwisely collected data.