Not so complex numbers in C#
Written by Mike James   
Tuesday, 25 March 2014
Article Index
Not so complex numbers in C#
Complex functions

Banner

Formatting

One last topic - formatting complex numbers.

The ToString method has a number of overloaded versions that can be used to apply a custom format. As we have already seen the simple ToString() method returns a string formatted as (real,imaginary).

The ToString(string) method will apply a standard format string to the two double precision values that make up the number. You can look up "Standard Numeric Format Strings" in the documentation.  For example:

Complex z = Complex.Exp(
             Complex.ImaginaryOne * Math.PI);
Console.WriteLine(z.ToString("F3"));

outputs:

(-1.000, 0.000)

That is two fixed point values with 3 digits after the decimal point. You can only use format specifiers that apply to Double.

The methods ToString(IFormatProvider) and ToString(string,IFormatProvider) will format the number using the culture specified by the IFormatProvider and in the second case will also format the doubles using the format string.

For example:

Console.WriteLine(
       z.ToString( new CultureInfo("es-ES")));
Console.WriteLine(
       z.ToString("F3",new CultureInfo("es-ES")));

displays:

(-1, 1,22460635382238E-16)
(-1,000, 0,000)

Note: es-ES is the specifier for Spanish and Spain.

The documentation contains an example of building a custom formatter that can be used to print values in the form a+ib or a+jb. However because you can't inherit from a struct  and even adding extension methods is difficult trying to extend Complex in any reasonably object-oriented way is doomed to fail.

csharp

 

If you would like to see an example of Complex in use then see:

Mandelbrot Zoomer in WPF

Related Articles

Mandelbrot Zoomer in WPF

The Programmer's Guide to Fractals       

How To Draw Einstein's Face Parametrically       

Good Math       

MathJS A Math Library For JavaScript       

 

To be informed about new articles on I Programmer, install the I Programmer Toolbar, subscribe to the RSS feed, follow us on, Twitter, FacebookGoogle+ or Linkedin,  or sign up for our weekly newsletter.

 

blog comments powered by Disqus

 

Banner


XML in C# - Using XElement

.NET has some really easy-to-use facilities for creating and editing XML. Many of these facilities were introduced to make Linq to XML work better, but you can make use of them in more general situati [ ... ]



What's The Matter With Pointers?

Back in the days when C was the language of choice, pointers meant programming and vice versa. Now in the more sophisticated and abstract days of C#, and even C++, raw pointers are a facility that is  [ ... ]


Other Articles

 

<ASIN:0387257683>

<ASIN:0521706858>

<ASIN:0321637135>

<ASIN:0521880688>

<ASIN:818561816X>

<ASIN:3540739157>

<ASIN:0954612078>



Last Updated ( Tuesday, 25 March 2014 )
 
 

   
RSS feed of all content
I Programmer - full contents
Copyright © 2014 i-programmer.info. All Rights Reserved.
Joomla! is Free Software released under the GNU/GPL License.