7 replies to this topic

[Omar (OZ)]

Alright before I go rob Einstein's brain and stuff it in my head. Does ANYONE know hoe I can calculate something like 3^2.5? I got a method for integer exponents but none for fractional ones. Any math genius here that can help?

[CW2]

something like 3^2.5?

var result = System.Math.Pow(3, 2.5);

[Omar (OZ)]

var result = System.Math.Pow(3, 2.5);

Well I should have looked for that secret Math class, I was making one >.<

[Chris Walker]

Quick question: .NET Micro Framework has some great math functions built in, but they are designed for low-power MCUs (so some of them are not as high of precision as their desktop counterparts). There are .NET MF source code samples out there of high-precision functions. Would you all be interested in an open source high-precision math library. If so, any math experts want to volunteer to help with the implementation? The Netduino hardware can certainly support it. Chris

[Omar (OZ)]

Quick question:

.NET Micro Framework has some great math functions built in, but they are designed for low-power MCUs (so some of them are not as high of precision as their desktop counterparts).

There are .NET MF source code samples out there of high-precision functions. Would you all be interested in an open source high-precision math library. If so, any math experts want to volunteer to help with the implementation? The Netduino hardware can certainly support it.

Chris

I am working on one!
I got this so far:

public static int Sin(int angle)
        {
            return Microsoft.SPOT.Math.Sin(angle);
        }

        public static long Cos(int angle)
        {
            return Microsoft.SPOT.Math.Cos(angle);
        }
        
        public static long Abs(long value)
        {
            long result;
            if (value < 0) 
                result = -value; 
            else 
                result = value;
            return result;
        }

        public static double Pow(double num, double exponent)
        {
            return System.Math.Pow(num, exponent);
        }

        public static double Root(double num, double root)
        {
            return Pow(num, (1/root));
        }

        public static double CovertToRange(double v, double inMin, double inMax, double outMin, double outMax)
        {
            return  outMin + (v - inMin) * (outMax - outMin) / (inMax - inMin);
        }

I got no comments yet since it isn't done or close to being done

[Solidus]

Quick question:

.NET Micro Framework has some great math functions built in, but they are designed for low-power MCUs (so some of them are not as high of precision as their desktop counterparts).

There are .NET MF source code samples out there of high-precision functions. Would you all be interested in an open source high-precision math library. If so, any math experts want to volunteer to help with the implementation? The Netduino hardware can certainly support it.

Chris

I would certainly be interested - FFT needs it

[Kamal]

I needed to calculate arctan for a project I am working and that is not automatically available in the microframework so I found this http://www.microfram...-with-full-net/ which worked beautifully. Here is the math library class file. http://www.microfram.../file/exMath.cs

[krst]

I needed to calculate arctan for a project I am working and that is not automatically available in the microframework so I found this http://www.microfram...-with-full-net/ which worked beautifully.

Here is the math library class file. http://www.microfram.../file/exMath.cs

Works great! Many thanks!