ajmath.c

Function ajRound

Rounds an integer to be a multiple of a given number.

Synopsis

Prototype

ajint ajRound (
      ajint i,
      ajint round
);

Input

i:(Input)Integer to round.
round:(Input)Rounding multiple.

Returns

ajint:Result.

Description

Rounds an integer to be a multiple of a given number.

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajRoundF

Rounds a floating point number to have bits free for cumulative addition

Synopsis

Prototype

float ajRoundF (
      float a,
      ajint nbits
);

Input

a:(Input)Float to round.
nbits:(Input)Number of bits to free.

Returns

float:Result.

Description

Rounds a floating point number to have bits free for cumulative addition

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajRecToPol

Converts cartesian co-ordinates to polar

Synopsis

Prototype

void ajRecToPol (
      float x,
      float y,
      float* radius,
      float* angle
);

Input

x:(Input)X co-ordinate
y:(Input)Y co-ordinate

Output

radius:(Output)Radius
angle:(Output)Angle

Returns

void:No return value

Description

Converts cartesian co-ordinates to polar

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajPolToRec

Converts polar co-ordinates to cartesian

Synopsis

Prototype

void ajPolToRec (
      float radius,
      float angle,
      float* x,
      float* y
);

Input

radius:(Input)Radius
angle:(Input)Angle

Output

x:(Output)X co-ordinate
y:(Output)Y co-ordinate

Returns

void:No return value

Description

Converts polar co-ordinates to cartesian

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajDegToRad

Converts degrees to radians

Synopsis

Prototype

float ajDegToRad (
      float degrees
);

Input

degrees:(Input)Degrees

Returns

float:Radians

Description

Converts degrees to radians

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajRadToDeg

Converts radians to degrees

Synopsis

Prototype

float ajRadToDeg (
      float radians
);

Input

radians:(Input)Radians

Returns

float:Degrees

Description

Converts radians to degrees

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajGaussProb

Returns a probability given a Gaussian distribution

Synopsis

Prototype

double ajGaussProb (
      float mean,
      float sd,
      float score
);

Input

mean:(Input)mean
sd:(Input)sd
score:(Input)score

Returns

double:probability

Description

Returns a probability given a Gaussian distribution

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajGeoMean

Calculate a geometric mean

Synopsis

Prototype

float ajGeoMean (
      const float* s,
      ajint n
);

Input

s:(Input)array of values
n:(Input)number of values

Returns

float:geometric mean

Description

Calculate a geometric mean

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajPosMod

Modulo always returning positive number

Synopsis

Prototype

ajint ajPosMod (
      ajint a,
      ajint b
);

Input

a:(Input)value1
b:(Input)value2

Returns

ajint:value1 modulo value2

Description

Modulo always returning positive number

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajRandomSeed

Seed for the ajRandomNumberD routine

Based on dprand and sdprand and used with the permission of the author.... Copyright (C) 1992 N.M. Maclaren Copyright (C) 1992 The University of Cambridge

This software may be reproduced and used freely, provided that all users of it agree that the copyright holders are not liable for any damage or injury caused by use of this software and that this condition is passed onto all subsequent recipients of the software, whether modified or not.

Synopsis

Prototype

void ajRandomSeed (
      void
);

Returns

void:No return value

Description

Seed for the ajRandomNumberD routine

Based on dprand and sdprand and used with the permission of the author.... Copyright (C) 1992 N.M. Maclaren Copyright (C) 1992 The University of Cambridge

This software may be reproduced and used freely, provided that all users of it agree that the copyright holders are not liable for any damage or injury caused by use of this software and that this condition is passed onto all subsequent recipients of the software, whether modified or not.

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajRandomNumber

Generate a pseudo-random number between 0-32767

Synopsis

Prototype

ajint ajRandomNumber (
      void
);

Returns

ajint:Random number

Description

Generate a pseudo-random number between 0-32767

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajRandomNumberD

Generate a random number between 0-1.0

Based on dprand and sdprand and used with the permission of the author.... Copyright (C) 1992 N.M. Maclaren Copyright (C) 1992 The University of Cambridge

This software may be reproduced and used freely, provided that all users of it agree that the copyright holders are not liable for any damage or injury caused by use of this software and that this condition is passed onto all subsequent recipients of the software, whether modified or not.

Synopsis

Prototype

double ajRandomNumberD (
      void
);

Returns

double:Random number

Description

Generate a random number between 0-1.0

Based on dprand and sdprand and used with the permission of the author.... Copyright (C) 1992 N.M. Maclaren Copyright (C) 1992 The University of Cambridge

This software may be reproduced and used freely, provided that all users of it agree that the copyright holders are not liable for any damage or injury caused by use of this software and that this condition is passed onto all subsequent recipients of the software, whether modified or not.

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajSp64Crc

Calculate 64-bit crc

Synopsis

Prototype

unsigned long long ajSp64Crc (
      const AjPStr thys
);

Input

thys:(Input)sequence

Returns

unsigned long long:64-bit CRC

Description

Calculate 64-bit crc

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajMathPos

Converts a string position into a true position. If ipos is negative, it is counted from the end of the string rather than the beginning.

Synopsis

Prototype

ajint ajMathPos (
      ajint len,
      ajint ipos
);

Input

len:(Input)String length.
ipos:(Input)Position (0 start, negative from the end).

Returns

ajint:string position between 0 and (length minus 1).

Description

Converts a string position into a true position. If ipos is negative, it is counted from the end of the string rather than the beginning.

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0

Function ajMathPosI

Converts a position into a true position. If ipos is negative, it is counted from the end of the string rather than the beginning.

imin is a minimum relative position. Usually this is the start position when the end of a range is being tested.

Synopsis

Prototype

ajint ajMathPosI (
      ajint len,
      ajint imin,
      ajint ipos
);

Input

len:(Input)maximum length.
imin:(Input)Start position (0 start, no negative values).
ipos:(Input)Position (0 start, negative from the end).

Returns

ajint:string position between 0 and (length minus 1).

Description

Converts a position into a true position. If ipos is negative, it is counted from the end of the string rather than the beginning.

imin is a minimum relative position. Usually this is the start position when the end of a range is being tested.

Usage

See source code

Example

In preparation

Errors

See source code

Dependencies

See source code

See Also

See other functions in this section

Availability

In release 3.0.0