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7.13 Special data classes ¶

This section describe special data classes mglDataV, mglDataF, mglDataT and mglDataR which sometime can noticeable speed up drawing or data handling. These classes are defined in #include <mgl2/data.h>. Note, that all plotting and data handling routines can be done using usual mglData or mglDataC classes. Also these special classes are usable in C++ code only.

Class mglDataV ¶

represent variable with values equidistantly distributed in given range.

Constructor on mglDataV: mglDataV (const mglDataV & d) ¶

Copy constructor.

Constructor on mglDataV: mglDataV (long nx=1, long ny=1, long nz=1, mreal v1=0, mreal v2=NaN, char dir='x') ¶

Create variable with "sizes" nxxnyxnz which changes from v1 to v2 (or is constant if v2=NaN) along dir direction.

Method on mglDataV: void Create (long nx=1, long ny=1, long nz=1) ¶

Set "sizes" nxxnyxnz.

Method on mglDataV: void Fill (mreal x1, mreal x2=NaN, char dir='x') ¶

Set ranges of the variable.

Method on mglDataV: void Freq (mreal dp, char dir='x') ¶

Set as frequency variable with increment dp.

Class mglDataF ¶

represent function which values are evaluated (instead of access to data array as in mglData).

Constructor on mglDataF: mglDataF (const mglDataF & d) ¶

Copy constructor.

Constructor on mglDataF: mglDataF (long nx=1, long ny=1, long nz=1) ¶

Create variable with "sizes" nxxnyxnz with zero function.

Method on mglDataF: void Create (long nx=1, long ny=1, long nz=1) ¶

Set "sizes" nxxnyxnz.

Method on mglDataF: void SetRanges (mglPoint p1, mglPoint p2) ¶

Set ranges for internal x,y,z variables.

Method on mglDataF: void SetFormula (const char *func) ¶

Set string which will be evaluated at function calls. Note this variant is about 10 times slower than SetFunc() one.

Method on mglDataF: void SetFunc (mreal (*f)(mreal x,mreal y,mreal z,void *p), void *p=NULL) ¶

Set pointer to function which will be used for data.

Class mglDataT ¶

represent named reference to column of another data array.

Constructor on mglDataT: mglDataT (const mglDataT & d) ¶

Copy constructor.

Constructor on mglDataT: mglDataT (const mglDataA & d, long col=0) ¶

Create variable which reference col-th column of data d.

Method on mglDataT: void SetInd (long col, wchar_t name) ¶

Method on mglDataT: void SetInd (long col, const wchar_t * name) ¶

Set reference to another column of the same data and its name.

Class mglDataR ¶

represent named reference to row of another data array.

Constructor on mglDataR: mglDataR (const mglDataR & d) ¶

Copy constructor.

Constructor on mglDataR: mglDataR (const mglDataA & d, long row=0) ¶

Create variable which reference row-th row of data d.

Method on mglDataR: void SetInd (long row, wchar_t name) ¶

Method on mglDataR: void SetInd (long row, const wchar_t * name) ¶

Set reference to another row of the same data and its name.

Class mglDataW ¶

represent FFT frequency as data array.

Constructor on mglDataW: mglDataW (const mglDataW & d) ¶

Copy constructor.

Constructor on mglDataW: mglDataW (long xx=1, long yy=1, long zz=1, double dp=0, char dir='x') ¶

Set frequency sizes, direction dir and increment dp.

Method on mglDataR: void Freq (double dp, char dir='x') ¶

Equidistantly fill the data with step dp in direction dir.

Class mglDataS ¶

incapsulate std::vector and present it as data array.

Variable of mglDataS: std::vector<mreal> dat ¶

Data array itself.

Constructor on mglDataS: mglDataS (const mglDataS & d) ¶

Copy constructor.

Constructor on mglDataS: mglDataS (const std::vector<mreal> & d) ¶

Create copy data from d.

Constructor on mglDataS: mglDataS (size_t s) ¶

Allocate memory for s .

Method on mglDataS: void reserve (size_t num) ¶

Reserve space for num elements.

Method on mglDataS: void push_back (double v) ¶

Appends value v to the end of data.