Differences

This shows you the differences between two versions of the page.

--- image_expression_type [2020/06/27 16:42]
admin
+++ image_expression_type [2022/02/17 18:27] (current)
chrystian
@@ Line 45: / Line 45: @@
 | Normal | Generate a random value using the Normal probability distribution. The value is generated according to the first and second given EXPR representing, respectively, the mean and the deviation of the distribution | rNormal(EXPR,@@@EXPR) | if@@@rNormal(10,@@@2)@@@>@@@9@@@then@@@1@@@else@@@i2 |
 | Poisson | Generate a random value using the Poisson probability distribution. The value is generated according to the given EXPR representing the distribution lambda | rPoisson(EXPR) | if@@@rPoisson(100)@@@>@@@95@@@then@@@1@@@else@@@i2 |
-| Squared Root | | sqrt(EXPR) | sqrt(i1@@@/@@@i4) |
+| Square Root | Returns the square root of the expression | sqrt(EXPR) | sqrt(i1@@@/@@@i4) |
 | Sin | Sin (input in radians) | sin(EXPR) | sin(i1@@@/@@@i4) |
 | Cos | Cos (input in radians) | cos(EXPR) | cos(i1@@@+@@@i2) |
@@ Line 53: / Line 53: @@
 | Atan | Atan (output in radians) | atan(EXPR) | atan(i1@@@+@@@i2) |
 | Ceil | [[wp>Floor_and_ceiling_functions|Convert the value to the smallest following integer]] | ceil(EXPR) | ceil(i1@@@+@@@i2) |
-| Exp | | exp(EXPR) | exp(i1[i1@@@+@@@i2]) |
+| Exp | Returns the natural exponential of the expression | exp(EXPR) | exp(i1[i1@@@+@@@i2]) |
 | Floor | [[wp>Floor_and_ceiling_functions|Convert the value to the largest previous integer]] | floor(EXPR) | floor(i1@@@+@@@i2) |
 | Round | Convert the value to the nearest integer | round(EXPR) | round(i1@@@/@@@i4) |
-| Abs | | abs(EXPR) | abs(i1@@@+@@@i2) |
+| Abs | Returns the absolute value of the expression | abs(EXPR) | abs(i1@@@+@@@i2) |
-| Ln | | ln(EXPR) | ln(i1@@@/@@@i4) |
+| Ln | Returns the natural logarithm of the expression | ln(EXPR) | ln(i1@@@/@@@i4) |
-| Log | | log(EXPR) | log(i1@@@/@@@i4) |
+| Log | Returns the logarithm of the expression to the base of 10 | log(EXPR) | log(i1@@@/@@@i4) |
-| Max | | max(EXPR,@@@EXPR) | max(i1,@@@i2) |
+| Max | Returns the maximum value | max(EXPR,@@@EXPR) | max(i1,@@@i2) |
-| Min | | min(EXPR,@@@EXPR) | min(i1,@@@i4) |
+| Min | Returns the minimum value | min(EXPR,@@@EXPR) | min(i1,@@@i4) |
 | Signal | Return +1, if the expression is positive, -1, if it is negative, and 0, otherwise. | signal(EXPR) | signal(i1@@@-@@@4) |
 | Abort | Abort the model execution | abort | if@@@i1@@@>@@@0@@@then@@@i1@@@*@@@i2@@@+@@@4@@@else@@@abort |
@@ Line 76: / Line 76: @@
 ^ Operator ^ Description ^ Syntax ^ Usage Example ^
 | Get Image Value | Return the image value at the current cell | IMAGE | i2 |
-| Get Image Value At Location | Return the image value on the specified cell coordinate. The cell coordinate is defined by two expressions where the first expression represents the cell line and the second expression represents the cell column. | IMAGE[@@@,@@@] | i1[line@@@–@@@1,@@@column@@@–@@@2] |
+| Get Image Value At Location | Return the image value on the specified cell coordinate. The cell coordinate is defined by two expressions where the first expression represents the cell line and the second expression represents the cell column. If the cell at that coordinate is null, the value 0 is returned. | IMAGE[@@@,@@@] | i1[line@@@–@@@1,@@@column@@@–@@@2] |
 | Get Image Null Value | Return the null value of the current image. It is also possible to specify an image whose corresponding null value will be retrieved. \\ The use of null without specifying an image "poisons" the expression evaluation forcing the expression result to be invalid. | null \\ null(IMAGE) | if@@@i1@@@>@@@2@@@then@@@i1@@@else@@@null \\ if@@@null(i2)@@@>@@@2@@@then@@@1@@@else@@@null |
 | Is Null | Return 1, if the given expression is null, and 0, otherwise. Can also be used to test whether the result of any expression is invalid or not. | isNull(EXPR) | if@@@not@@@isNull(i1)@@@then@@@i1@@@else@@@i2 |