Changes for version 5.2 of NMath include:

• Upgraded to Intel MKL 10.3 Update 11 with resulting performance increases.
• Added class NMathConfiguration for controlling the loading of the NMath
  license key, kernel assembly, and native library. Logging can be enabled for debugging configuration issues.
  License files are no longer used. See here for more information.
• Replaced all custom NMath delegate types in the API with Func or Action
  equivalents, and deprecated the older signatures.
• Added support for postive and negative strided signals in all FFT classes.

A complete changelog is located here.

Version 3.5 of NMath Stats adds:

• Classes DoubleFactorAnalysis, FactorAnalysisCorrelation, FactorAnalysisCovariance, and supporting types for performing factor analysis.
• Class OneSampleAndersonDarlingTest for performing an Anderson-Darling test of the distribution of one sample.
• Class ShapiroWilkTest for testing the null hypothesis that a sample comes from a normally distributed population.
• Method NMathFunctions.FishersExactTest() for computing the Fisher’s Exact Test p-value for a specified 2 x 2 contingency table.

A complete changelog is located here.

The new release is build-compatible with the prior release. Upgrades are provided free of charge to customers with current annual maintenance contracts. Maintenance contracts are available through our webstore.

The post New Versions of NMath Libraries Released appeared first on CenterSpace.

An NMath license file is no longer used.

NMath License Key

NMath license information is stored in a license key which must be found at runtime. The license key governs the properties of your NMath installation. If no license key is found, a default evaluation license key is used which provides a free 30-day evaluation period for NMath on the current machine.

When you purchase one or more developer seats of NMath, you will be issued a license key describing the terms of your license. To enter your license key:

1. Open CenterSpace Software | License NMath from your Start menu.
2. Enter your name, email, and license key, and click OK.

The license key will be written to the registry. You can also specify your license key using various other mechanisms: by environment variable, by configuration app setting, and programmatically. These mechanisms may be preferable in group development environments, and at deployment. (See below.)

NMath Configuration

NMath configuration settings govern the loading of the NMath license key, kernel assembly, and native library. Property values can be set three ways:

• by environment variable
• by configuration app setting
• by programmatically setting properties on class NMathConfiguration

Settings are applied in that order, and resetting a property takes precedent over any earlier values. For example, here an environment variable is used:

 > set NMATH_NATIVE_LOCATION="C:\tmp"

This code uses an app config file:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="NMathNativeLocation" value="C:\tmp" />
  </appSettings>
</configuration>

And this code accomplishes the same thing programmatically:

NMathConfiguration.NativeLocation = @"C:\tmp";

Also, all paths can be specified relative to the executable. So to place the natives in an existing directory named resources adjacent to the executable one would
write:

NMathConfiguration.NativeLocation = @"..\resources";

The supported environment variables, configuration app setting keys, and property names are show below.

Environment Variable
Configuration Setting
Property


NMATH_LOG_LOCATION
NMathLogLocation
LogLocation


NMATH_LICENSE_KEY
NMathLicenseKey
LicenseKey


NMATH_NATIVE_LOCATION
NMathNativeLocation
NativeLocation


NMATH_USE_SEQUENTIAL_THREADING
NMathUseSequentialThreading
UseSequentialThreading


NMATH_USE_EXTERNAL_THREADING
NMathUseExternalThreading
UseExternalThreading

NOTE- Assembly loading and license checking is normally performed the first time you make an NMath call. If you wish to explicitly control when these operations occur–at application start-up, for example–use the static NMathConfiguration.Init() method.

For example, when using Mono on a Mac, to configured NMath with a sequentially threaded library set the environmental variable as follows.

 > export NMATH_USE_SEQUENTIAL_THREADING="True" 

Logging

To debug configuration issues, specify a log file location. For example, setting the property programmatically to place the NMath log file in the same directory as the executable one would write:

NMathConfiguration.LogLocation = @".";

Or if you prefer to use a global temporary directory you could specify an absolute path.

NMathConfiguration.LogLocation = @"C:\temp\logs";

This creates a file named NMathConfiguration.log at the specified location containing log output. The specified location must exist. To turn off logging, set the log location to null.

License Key

You can specify your NMath license key using the LicenseKey property, or the equivalent environment variable or app config setting. If so, any keys in the registry are ignored.

Native Location

The NMath native assembly must be found at runtime. Failure to locate this file is one of the most common configuration issues, especially in deployment. The search order is determined by your PATH (on Windows systems). Some standard locations are automatically prepended to your (process-specific) PATH. You can also use the NativeLocation property, or the equivalent environment variable or app config setting, to prepend another location.

Alternative Kernel and Native Assemblies

The names of the NMath kernel and native assemblies are determined by your platform (x86 or x64), and the values of the UseSequentialThreading and UseExternalThreading properties, as shown below:

Standard
     Kernel
          NMathKernelx86.dll
          NMathKernelx64.dll
     Native
          nmath_native_x86.dll
          nmath_native_x64.dll

Sequentially-Threaded
     Kernel
          NMathKernelx86Sequential.dll
          NMathKernelx64Sequential.dll
     Native
          nmath_native_x86_seq.dll
          nmath_native_x64_seq.dll

Externally-Threaded
     Kernel
          NMathKernelx86External.dll
          NMathKernelx64External.dll
     Native
          nmath_native_x86_ext.dll
          nmath_native_x64_ext.dll

Sequentially-threaded and externally-threaded kernel and native assemblies are available upon request from CenterSpace Software:

• Sequentially-Threaded: MKL contains highly optimized, extensively threaded math routines. In rare cases, these can cause conflicts between the Intel OMP threading library (libiomp.dll) and the .NET threading model. If your .NET application is itself highly multi-threaded, you may wish to use the sequentially-threaded version of MKL.
• Externally-Threaded: NMath normally statically links in the Intel OMP threading library described above. Sometimes this can cause collisions with libraries from other vendors that also use OMP. The externally-threaded version of NMath dynamically-links in OMP.

To trigger loading of these assemblies, use properties UseSequentialThreading and UseExternalThreading on class NMathConfiguration, or the equivalent environment variables or app config settings. Both properties default to false.

UseSequentialThreading and UseExternalThreading are mutually exclusive, and UseSequentialThreading takes precedence; UseExternalThreading only has an effect if UseSequentialThreading is false.

The post NMath Configuration appeared first on CenterSpace.

Version 5.1 of NMath adds:

• Assembly NMathChartMicrosoft.dll containing class NMathChart, which provides static methods for plotting NMath types using the Microsoft Chart Controls for .NET. [More]

• Classes for solving first order initial value differential equations by the Runge-Kutta method. Class FirstOrderInitialValueProblem encapsulates a first order initial value differential equation, and class RungeKuttaSolver solves them. [More]
• Exponential moving average filter weights to class MovingWindowFilter.

A complete changelog is located here.

Version 3.4 of NMath Stats adds:

• Assembly NMathStatsChartMicrosoft.dll containing class NMathStatsChart, which provides static methods for plotting NMath Stats types using the Microsoft Chart Controls for .NET. [More]

• Class TwoSampleUnpairedUnequalTTest. Unlike TwoSampleUnpairedTTest, a pooled estimate of the variance is not used.

A complete changelog is located here.

The new release is build-compatible with the prior release. Upgrades are provided free of charge to customers with current annual maintenance contracts. Maintenance contracts are available through our webstore.

This release features simplified NMath and NMath Stats installers. Updated license keys will be issued at upgrade time. A license file must now be deployed with your NMath applications.

The post New Versions of NMath Libraries Released appeared first on CenterSpace.

Version 5.0 of NMath adds:

• A new set of random number generator classes based on MKL vectorized random number generators
• Classes for creating independent streams of random numbers using the leapfrop and skip-ahead methods
• Classes for generating quasirandom sequences using Niederreiter and Sobal methods
• Classes for solving quadratic programming (QP) and nonlinear programming (NLP) problems

Version 3.3 of NMath Stats adds a class for performing a Pearson’s chi-square hypothesis test.

The new release is build-compatible with the prior release. Upgrades are provided free of charge to customers with current annual maintenance contracts. Maintenance contracts are available through our webstore.

The post New Versions of NMath Libraries Released appeared first on CenterSpace.

Version 4.1 of NMath adds peak finding and Savitzky-Golay derivatives, a Runge-Kutta ODE solver, the Box-Cox transformation for making non-normal data resemble normally-distributed data, and faster vector math.

Version 3.1 of NMath Stats adds Johnson transformations of the normal distribution, the Kruskal-Wallis rank sum test, and regression statistics for polynomial fitting and curve fitting.

The new release is build-compatible with the prior release. Upgrades are provided free of charge to customers with current annual maintenance contracts. Maintenance contracts are available through our webstore.

The post New Versions of NMath Libraries Released appeared first on CenterSpace.