Calculates a 2D array of the partial derivatives of a function of two independent variables. Details
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number of points describes the number of grid points for both variables. The default is 25. |
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Start are the start points of both variables, that is, an array of length 2. The default values are (0,0). |
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End are the end points of both variables, that is, an array of length 2. The default values are (1,1). |
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derivative is a value of 0 represents the partial derivative of the first variable. A value of 1 represents the partial derivative of the second variable. |
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formula is a string describing the function. |
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Variables is an array of two strings representing the two variables with respect to the naming conventions of the Formula VIs. The default variables are (x1, x2). Refer to Formula VI Variables for more information about valid variables. |
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X1 Values is the resulting 1D array. |
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X2 Values is the resulting 1D array. |
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Partial derivative of f(x1,x2) is the 2D array of the fixed partial derivative at the defined grid points. For a derivative of 0, the function df(x1, x2)/dx1 is calculated. For a derivative of 1 the function df(x1, x2)/dx2 is calculated. |
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error denotes any incorrect function definitions and/or discrepancies between the function definition and the array of variables. An additional error can occur if the derivative is neither 0 nor 1. |
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ticks is the time effort for the whole calculation of the function values in milliseconds. |
The -derivative of the function
is investigated in the interval (2, 2) by (2, 2). The values are obtained by entering the following on the front panel: