Tool Function Plotter
Generate a grid based on a functional expression. The function interpreter uses an formula expression parser that offers the following operators:
| + | Addition |
| - | Subtraction |
| * | Multiplication |
| / | Division |
| abs(x) | Absolute Value |
| mod(x, y) | Returns the floating point remainder of x/y |
| int(x) | Returns the integer part of floating point value x |
| sqr(x) | Square |
| sqrt(x) | Square Root |
| exp(x) | Exponential |
| pow(x, y) | Returns x raised to the power of y |
| x ^ y | Returns x raised to the power of y |
| ln(x) | Natural Logarithm |
| log(x) | Base 10 Logarithm |
| pi() | Returns the value of Pi |
| sin(x) | Sine |
| cos(x) | Cosine |
| tan(x) | Tangent |
| asin(x) | Arcsine |
| acos(x) | Arccosine |
| atan(x) | Arctangent |
| atan2(x, y) | Arctangent of x/y |
| min(x, y) | Returns the minimum of values x and y |
| max(x, y) | Returns the maximum of values x and y |
| gt(x, y) | Returns true (1), if x is greater than y, else false (0) |
| x > y | Returns true (1), if x is greater than y, else false (0) |
| lt(x, y) | Returns true (1), if x is less than y, else false (0) |
| x < y | Returns true (1), if x is less than y, else false (0) |
| eq(x, y) | Returns true (1), if x equals y, else false (0) |
| x = y | Returns true (1), if x equals y, else false (0) |
| and(x, y) | Returns true (1), if both x and y are true (i.e. not 0) |
| or(x, y) | Returns true (1), if at least one of both x and y is true (i.e. not 0) |
| ifelse(c, x, y) | Returns x, if condition c is true (i.e. not 0), else y |
| rand_u(x, y) | Random number, uniform distribution with minimum x and maximum y |
| rand_g(x, y) | Random number, Gaussian distribution with mean x and standard deviation y |
- Author: A.Ringeler (c) 2003
- Menu: Grid|Calculus|Grid Generation
Parameters
| Name | Type | Identifier | Description | Constraints | |
|---|---|---|---|---|---|
| Input | Target System (*) | Grid (optional input) | TARGET_TEMPLATE | use this grid's system for output grids | - |
| Output | Function | Grid (output) | FUNCTION | - | - |
| Options | Formula | Text | FORMULA | - | Default: sin(x*x + y*y) |
| X Range | Value range | X_RANGE | - | - | |
| Y Range | Value range | Y_RANGE | - | - | |
| Target Grid System | Choice | TARGET_DEFINITION | - | Available Choices: [0] user defined [1] grid or grid system Default: 0 | |
| Cellsize | Floating point | TARGET_USER_SIZE | - | Minimum: 0.000000 Default: 1.000000 | |
| Left | Floating point | TARGET_USER_XMIN | - | Default: 0.000000 | |
| Right | Floating point | TARGET_USER_XMAX | - | Default: 100.000000 | |
| Bottom | Floating point | TARGET_USER_YMIN | - | Default: 0.000000 | |
| Top | Floating point | TARGET_USER_YMAX | - | Default: 100.000000 | |
| Fit | Choice | TARGET_USER_FITS | - | Available Choices: [0] nodes [1] cells Default: 0 | |
| Grid System | Grid system | TARGET_SYSTEM | - | - | |
| (*) optional | |||||
Command-line
Usage: saga_cmd grid_calculus 4 [-FORMULA <str>] [-X_RANGE_MIN <double>] [-X_RANGE_MAX <double>] [-Y_RANGE_MIN <double>] [-Y_RANGE_MAX <double>] [-TARGET_DEFINITION <str>] [-TARGET_USER_SIZE <double>] [-TARGET_USER_XMIN <double>] [-TARGET_USER_XMAX <double>] [-TARGET_USER_YMIN <double>] [-TARGET_USER_YMAX <double>] [-TARGET_USER_FITS <str>] [-TARGET_TEMPLATE <str>] [-FUNCTION <str>] -FORMULA:<str> Formula Text Default: sin(x*x + y*y) -X_RANGE_MIN:<double> X Range Value range -X_RANGE_MAX:<double> X Range Value range -Y_RANGE_MIN:<double> Y Range Value range -Y_RANGE_MAX:<double> Y Range Value range -TARGET_DEFINITION:<str> Target Grid System Choice Available Choices: [0] user defined [1] grid or grid system Default: 0 -TARGET_USER_SIZE:<double> Cellsize Floating point Minimum: 0.000000 Default: 1.000000 -TARGET_USER_XMIN:<double> Left Floating point Default: 0.000000 -TARGET_USER_XMAX:<double> Right Floating point Default: 100.000000 -TARGET_USER_YMIN:<double> Bottom Floating point Default: 0.000000 -TARGET_USER_YMAX:<double> Top Floating point Default: 100.000000 -TARGET_USER_FITS:<str> Fit Choice Available Choices: [0] nodes [1] cells Default: 0 -TARGET_TEMPLATE:<str> Target System Grid (optional input) -FUNCTION:<str> Function Grid (output)