DPUSER - The Next Generation: Category index
Author: Thomas Ott

# Category index

The functions and procedures supplied by DPUSER can be sorted by the following categories:

Mathematical functions | User interaction | Environment settings | Date and time
String manipulation | File access | Matrix creation | FITS file handling
Data reduction |  |  |

## Mathematical functions

### Trigonometric functions

sin | cos | tan | asin | acos | atan
sinh | cosh | tanh | asinh | acosh | atanh
pi | deg2rad | rad2deg |  |  |

### Statistical functions

total | min | max | avg | median |
|  |  | stddev | meddev | variance

### Complex number arithmetics

DPUSER is able to handle complex numbers within most functions. Some functions are provided which only make sense when used with complex numbers. When used with real numbers, no error is generated, but a value of zero is returned.

complex | polar | conj |  |  |
abs | arg | imag | real |  |

### Matrix arithmetics

invert | transpose |  |  |  |

### Function fitting

polyfit | polyfitxy | polyfitxyerr | interpol |  |
gaussfit | gauss2dfit | multigauss2dfit | gauss2dsimplefit |  |
sersicfit | sersic2dfit | sersic2dsimplefit |  |  |

### Other mathematical functions

float | int | round | frac | abs | sign
exp | ln | log | sqrt | gammp | ten
bessel | erf | random | randomg | poly | cirrange

## User interaction

free | mem | print | printf | read | userDialog
exec | run | break | sleep | compile |

## Environment settings

setenv | getenv | isvariable | echo | debug |

## Date and time

jd | jdfraction | jdnumber | now | dayofweek | calday
lmst |  |  |  |  |

## String manipulation

char | string | stringarray | lower | upper | replace
sprintf | sort | strlen | nelements | strpos | right
strtrim | simplifywhitespace | strsplit |  |  |
import | export |  |  |  |

## File access

cd | dir | pwd | fileexists | filesize | findfile
import | export | writebmp |  |  |

## Matrix creation

### Empty matrices

All these functions create empty matrices, i.e. all values are initialized with zero.

fits |  |  |  |  |
bytearray | shortarray | longarray | floatarray | doublearray | complexarray

### Matrix filter creation

gauss | sersic2d | circle | ellipse | delta | rect
cosbell | airy | chinhat | quickgauss |  |

## FITS file handling

### Reading and writing

readfits | writefits | header | import | export | swapbytes

### Information

naxis | naxis1 | naxis2 | naxis3 | nelements |
getfitskey | setfitskey | setwcs |  |  |

### FITS cubes

cubeavg | cubemaximum | cubemedian | cubeminimum | cubemerge |

## Data reduction

### Image manipulation

boxcar | cblank | center | clip | collapse | enlarge
flip | magnify | norm | rebin | resize | rotate
setbitpix | shift | shrink | smooth | mosaic | reform

### Fourier transform

fft | correl | reass | convolve |  |

### Statistics, lists

xmax | ymax | maxima | xcen | ycen | centroids
centroid | fwhm | markpos | saomark | limits |

### Interaction with IRAF imtool

sao | imexa | saomarklabel | saomarkpoint | saoclear |
markpos | saomark |  |  |  |

### Analysis

find | photometry | transcoords | transmatrix | transform | transpoly

### Speckle

ssa | ssaselect | ssastat | sssa |  |
swsa | wsa | wsastat |  |  |
dpixapply | dpixcreate |  |  |  |

### Deconvolution

lucy | wien | clean | maxentropy | psf |

### Specialized 3D operations

This set of functions was copied from the 3D data reduction software (which uses Gipsy). They work only on original 3D (an imaging spectrograph build by MPE) data, which is of size 256x256, 256x600, or 16x16x600. These functions are extremely poorly documented within DPUSER. Use of those is depreciated.

3dcal | 3dcubin | 3dexpand | 3dmegacal |  |
3dmerge | 3dnorm | 3dspec | spec3d |  |