Separate IP parts
How do I separate IP parts with dlang? I found this very cool trick, with C++: http://stackoverflow.com/a/5328190 std::string ip ="192.168.1.54"; std::stringstream s(ip); int a,b,c,d; //to store the 4 ints char ch; //to temporarily store the '.' s >> a >> ch >> b >> ch >> c >> ch >> d; std::cout << a << " " << b << " " << c << " "<< d; I wonder what's the equivalent D code.
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 22:07:31 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.
Re: Draw math formulas with ggplotd
On Saturday, 17 September 2016 at 11:45:07 UTC, Edwin van Leeuwen wrote: On Saturday, 17 September 2016 at 11:22:04 UTC, John Colvin wrote: On Saturday, 17 September 2016 at 02:41:15 UTC, brocolis wrote: How do I draw math formulas programmatically? I want to do on screen what latex does on .pdf. And I want to draw a math formula in the image generated with ggplotd. Generate data from those formulas (I like to do this with something like iota(0, 10, 0.05).map!(x => sqrt(x) / (1 + sin(x)^^2)) and then plot that. For this part ggplotd does have a helper function: http://blackedder.github.io/ggplotd/ggplotd/stat.html#statFunction auto gg = statFunction(x => sqrt(x) / (1 + sin(x)^^2), 0.0, 10).geomLine().putIn(GGPlotD()); But I assumed he meant adding the formula onto the plot. Yes I want adding the formula onto the plot. Thanks.
Draw math formulas with ggplotd
How do I draw math formulas programmatically? I want to do on screen what latex does on .pdf. And I want to draw a math formula in the image generated with ggplotd.
Re: ggplotd - curve colour
On Monday, 9 May 2016 at 06:24:22 UTC, Edwin van Leeuwen wrote:
On Monday, 9 May 2016 at 02:29:47 UTC, brocolis wrote:
Is this correct usage?
auto gg = GGPlotD().put( geomLine( Aes!(typeof(xs), "x",
typeof(ysfit), "y", string, "colour")( xs, ysfit, "red") ) );
The output is a blank png file.
Full source:
import ggplotd.ggplotd;
import ggplotd.geom;
import ggplotd.aes;
import ggplotd.axes;
void main()
{
import std.array : array;
import std.algorithm : map;
import std.range : iota;
import ggplotd.colour;
auto f = (double x) { return x; };
auto xs = iota(-5, 5, 0.1 ).array;
auto ysfit = xs.map!((x) => f(x)).array;
auto gg = GGPlotD().put( geomLine( Aes!(typeof(xs), "x",
typeof(ysfit), "y", string, "colour")( xs, ysfit, "red") ) );
gg.put( xaxisOffset( 0) ).put( yaxisOffset( 0) );
gg.save( "axes.png", 500, 300 );
}
The problem there is that colour also needs to be an
InputRange. This is so that different points can have a
different colours associated with it, which is particularly
useful if you want to plot some data and have different types
of data plotted as different colours.
In your example you can either do:
```
auto colour = "red".repeat( xs.length );
auto gg = GGPlotD().put( geomLine( Aes!(typeof(xs), "x",
typeof(ysfit), "y", typeof(colour), "colour")( xs, ysfit,
colour) ) );
```
Or use the mergeRange function mentioned before, which will
automatically repeat if one argument is a single element.
```
auto aes = Tuple!( string, "colour" )( "red" ).mergeRange(
Aes!(typeof(xs), "x",
typeof(ysfit), "y" )( xs, ysfit ) );
```
OK! Thank you.
Re: ggplotd - curve colour
Is this correct usage?
auto gg = GGPlotD().put( geomLine( Aes!(typeof(xs), "x",
typeof(ysfit), "y", string, "colour")( xs, ysfit, "red") ) );
The output is a blank png file.
Full source:
import ggplotd.ggplotd;
import ggplotd.geom;
import ggplotd.aes;
import ggplotd.axes;
void main()
{
import std.array : array;
import std.algorithm : map;
import std.range : iota;
import ggplotd.colour;
auto f = (double x) { return x; };
auto xs = iota(-5, 5, 0.1 ).array;
auto ysfit = xs.map!((x) => f(x)).array;
auto gg = GGPlotD().put( geomLine( Aes!(typeof(xs), "x",
typeof(ysfit), "y", string, "colour")( xs, ysfit, "red") ) );
gg.put( xaxisOffset( 0) ).put( yaxisOffset( 0) );
gg.save( "axes.png", 500, 300 );
}
ggplotd - curve colour
How do I set the color of a curve with ggplotd? Thanks.
