Re: polar coordinates with ggplotd
On Monday, 19 September 2016 at 12:34:56 UTC, Edwin van Leeuwen wrote: On Sunday, 18 September 2016 at 22:13:35 UTC, brocolis wrote: Found an error in ys line. Thanks. Does that mean you solved it? Currently there is no special support for other coordinate systems, but I recently added Guides for x/y coordinates which should make this relatively straightforward to implement and is next on the list. Not sure when I'll get a chunk of time to implement it though. For now you will have to convert the coordinates yourself, before plotting them. Yeah, problem solved. Thanks.
Re: polar coordinates with ggplotd
On Sunday, 18 September 2016 at 22:13:35 UTC, brocolis wrote: Found an error in ys line. Thanks. Does that mean you solved it? Currently there is no special support for other coordinate systems, but I recently added Guides for x/y coordinates which should make this relatively straightforward to implement and is next on the list. Not sure when I'll get a chunk of time to implement it though. For now you will have to convert the coordinates yourself, before plotting them.
Re: polar coordinates with ggplotd
On Sunday, 18 September 2016 at 22:07:31 UTC, brocolis wrote:
I've tried this code.
import ggplotd.ggplotd;
import ggplotd.geom;
import ggplotd.aes;
import ggplotd.axes;
import std.math;
auto r(double theta)
{
return 2 * sin(6*theta);
}
auto getX(double theta)
{
return r(theta) * cos(theta);
}
auto getY(double theta)
{
return r(theta) * sin(theta);
}
void main()
{
import std.array : array;
import std.algorithm : map;
import std.range : iota;
auto theta = iota(0, 2*PI, 0.1).array;
auto xs = theta.map!((x) => getX(x)).array;
auto ys = xs.map!((x) => getY(x)).array;
auto gg = GGPlotD().put( geomLine( Aes!(typeof(xs), "x",
typeof(ys), "y")(xs, ys) ) );
gg.put( xaxisRange(-5, 5) ).put( xaxisLabel( "x" ) );
gg.put( yaxisRange(-5, 5) ).put( yaxisLabel( "y" ) );
gg.put( xaxisOffset(0) ).put( yaxisOffset(0) );
gg.save( "output.png", 500, 300 );
}
And I got the output: http://imgur.com/KwLYJpN
Expected:
https://www.wolframalpha.com/input/?i=polar+plot+2*sin(6*theta)
I need to somehow activate "polar" mode in ggplotd. Thanks.
Found an error in ys line. Thanks.
polar coordinates with ggplotd
I've tried this code.
import ggplotd.ggplotd;
import ggplotd.geom;
import ggplotd.aes;
import ggplotd.axes;
import std.math;
auto r(double theta)
{
return 2 * sin(6*theta);
}
auto getX(double theta)
{
return r(theta) * cos(theta);
}
auto getY(double theta)
{
return r(theta) * sin(theta);
}
void main()
{
import std.array : array;
import std.algorithm : map;
import std.range : iota;
auto theta = iota(0, 2*PI, 0.1).array;
auto xs = theta.map!((x) => getX(x)).array;
auto ys = xs.map!((x) => getY(x)).array;
auto gg = GGPlotD().put( geomLine( Aes!(typeof(xs), "x",
typeof(ys), "y")(xs, ys) ) );
gg.put( xaxisRange(-5, 5) ).put( xaxisLabel( "x" ) );
gg.put( yaxisRange(-5, 5) ).put( yaxisLabel( "y" ) );
gg.put( xaxisOffset(0) ).put( yaxisOffset(0) );
gg.save( "output.png", 500, 300 );
}
And I got the output: http://imgur.com/KwLYJpN
Expected:
https://www.wolframalpha.com/input/?i=polar+plot+2*sin(6*theta)
I need to somehow activate "polar" mode in ggplotd. Thanks.
