Source code for line graphing
Author Message
Source code for line graphing

Does anyone have source code for drawing a line graph
in pixels so one can have 100's of points.  The commercial
programs I have tried are all very limited as to the number
of data points they can plot.

Alan

Fri, 26 Mar 1999 03:00:00 GMT
Source code for line graphing

Quote:

> Does anyone have source code for drawing a line graph
> in pixels so one can have 100's of points.  The commercial
> programs I have tried are all very limited as to the number
> of data points they can plot.

> Alan

To plot a point, just to this:

Switch to a graphics mode (screen 7 & screen 13 can support 360x200
points, screen 12 640x480, and screen 9 640x200).

just do this:
SCREEN x        'x = whatever mode you want, look above.
PSET (x,y),color        'x & y are the x and y positions of the point,
'"color" is a number from 1 to 15.

Here's an example:

SCREEN 12
PSET (320,240),12

That code will put a red 'point' at those co-ordinates (Which happens to
be the middle of that particular screen.).. I hope that answers your
question, If not, I just sounded like a real dork :)

Sat, 27 Mar 1999 03:00:00 GMT
Source code for line graphing

Quote:

> > Does anyone have source code for drawing a line graph
> > in pixels so one can have 100's of points.  The commercial
> > programs I have tried are all very limited as to the number
> > of data points they can plot.

> > Alan

>         To plot a point, just to this:

> Switch to a graphics mode (screen 7 & screen 13 can support 360x200
> points, screen 12 640x480, and screen 9 640x200).

Whoops!  I think you mean *320*x200, not 360x200 for screens 7 and 13.
Also, screen mode 13h supports higher resolutions using ModeX, but that's
a different thing entirely.

Quote:

> just do this:
> SCREEN x        'x = whatever mode you want, look above.
> PSET (x,y),color        'x & y are the x and y positions of the point,
>                         '"color" is a number from 1 to 15.

Two somewhat petty corrections.  :-)

No. 1.  Screen modes 7, 8, 9, and 12 are 16 color modes.  That means that
you can use colors 0-15 not 1-15.

Also.  Screen mode 13h allows 256 colors, so you aren't limited to colors
0-15, but rather you have colors 0-255.

-Jesse

Quote:
> Here's an example:

> SCREEN 12
> PSET (320,240),12

> That code will put a red 'point' at those co-ordinates (Which happens to
> be the middle of that particular screen.).. I hope that answers your
> question, If not, I just sounded like a real dork :)

--
====================================
Very funny Scotty!
Now beam down my clothes!
====================================

Sat, 27 Mar 1999 03:00:00 GMT

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