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vegipete

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Joined: 29/01/2013
Location: Canada
Posts: 1109

Posted: 07:48pm 09 Mar 2024

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The LINE GRAPH command is proving quite useful for drawing, well, graphs.

LINE GRAPH x(),y(),colour

This command generates a line graph of the coordinate pairs specified in
“x()” and “y()”. The graph will have n-1 segments where there a n elements
in the x and y arrays.

Would it be possible to add an extra optional parameter specifying n where n is <= the number of elements in the arrays?

Even better would be another parameter, m, specifying the starting element.

The benefit would be two-fold: the ability plot just a window in the full data set, and to not require the entire array to be filled with valid data.

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I can see benefits to many of the commands/functions that act on arrays having starting and ending element number parameters. For example, Math(max arrayname(),m,n) would pick out the max value in the specified window.

And yes, much of this can be done with variations on

math set a(m),b() ' fill all of b() with useful data
addr1 = Peek(VARADDR a())
addr2 = Peek(VARADDR b())
Memory COPY FLOAT addr1 + m*8, addr2, n ' copy some of a() to b()
maxval = Math(max b())

but that's a bunch of extra error prone steps and can't be faster than existing commands with start/end parameters would be.

Thank you for considering this!

Visit Vegipete's *Mite Library for cool programs.

stanleyella

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Joined: 25/06/2022
Location: United Kingdom
Posts: 2127

Posted: 10:18pm 09 Mar 2024

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I used line graph for a game.
"Would it be possible to add an extra optional parameter specifying n where n is <= the number of elements in the arrays?"
it does I think.
"Even better would be another parameter, m, specifying the starting element."
'til then copy from start to another array?
dim integer lx(43)=(0,5,9,13,3,18,25,30,48,53,57,47,32,11,5,9,57,89,108,149,170,220,262,300,320,400,447,493,510,545,572,600,638,605,590,577,560,513,495,470,457,500,639)
'
dim integer ly(43)=(0,7,15,25,40,70,100,130,130,160,193,253,298,346,420,430,430,400,370,457,450,400,440,466,424,400,460,460,452,403,373,320,240,210,190,170,130,120,137,110,60,26,0)
Line GRAPH lx(),ly()

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