"Samples in Fortran are not acceptable."

47

Also before this:

I did (on macOS):

conda create -n gf gfortran fpm gnuplot
conda load gf

Then everything compiles and runs. The ogpf + gnuplot combination fails on macOS unfortunately:

$ fpm run --example

 gpf: gnuplot from Fortran Demonstration
 Example 1: Demo for xy plot
 Example 2: Line specification
 Example 3: Plot several data series at the same time
 Example 4: Plot four data series at the same time
 Example 5: Use line style, line colors and more...
 Example 6: An interesting plot, sin(x) and its zero on the same plot
 Example 7: Plot a matrix against a vector
 Example 8: Plot a matrix against a vector and set the linespec and legend
 Example 9: Use gnuplot for animation
 Example 10: Use ogpf options
 Example 11: simple polar plot
 Example 12: A plot with logarithmic x axis
 Example 13: A matrix plot with logarithmic y axis
 Example 14: A loglog plot
 Example 15: Plotting a function
 Example 16: Save the gnuplot script into a file for future use
 Example 17: Multi window plots, using script
 Example 18: Running an external script file
 Example 19: Multiple linestyle in matrix plot
 Example 20: Scatter plot
 Example 21: Stem plot
 Example 22: Stem plot animation
 Example 23: Another animation using matrix plot
 Example 24: Multiplot layout
 Example 25: Multiplot layout followed by simple plot
 Example 26: Plot matrix vs. matrix
 Example 27: Using secondary y axis
 Example 28: Using secondary x and y axis
 Example 29: Using color and size for title and labels
 Example 30: More on labels color and size with secondary axes

 ***   Surface and Contour Plots ***

 Example 101: Simple 3D plot using surf
 Example 102: Surface plot and color palette 
 Example 103: Surface plot with hidden details and its contour
 Example 104: Cylindrical mapping
 Example 105: More contour plot
 Example 106: Animation of 3D plots
 Example 106: Multiplot layout in 3D
 Example 107: Multiplot layout for 3D data
 Example 108: Plot a 2D grid

2D plots: select an example: 1 through 30
3D plots: select an example: 101 through 108
enter 0 for exit:  1

set term wxt size 640,480 enhanced font "verdana,10" title "ogpf libray: Rev. 0.22 of March 9th, 2018"
         ^
"ogpf_temp_script.gp" line 6: unknown or ambiguous terminal type; type just 'set terminal' for a list


 press any key to continue...

Reported at The example fails on macOS · Issue #14 · kookma/ogpf · GitHub.

But the GitHub page for ogpf looks impressive.

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48

This error is only related to gnuplot.

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49

In subroutine sub_animation_start(this, pause_seconds) if we change the
integer, intent(in), optional :: pause_seconds
to
real, intent(in), optional :: pause_seconds
we can set the animation faster - 0.5 sec or so. Of course it’s animation so someone may want to see slow motion.

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50

Quote from Leo in Once Upon a Time in Hollywood,

“Is there some old, old, beef between Fortran and ORNL?”

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