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# 1D & 2D Evaluation VIs

LabVIEW 2013 Help

Edition Date: June 2013

Part Number: 371361K-01

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Owning Palette: Scripts & Formulas VIs

Requires: Full Development System. This topic might not match its corresponding palette in LabVIEW depending on your operating system, licensed product(s), and target.

Use the 1D & 2D Evaluation VIs to examine 1D and 2D functions given in symbolic form, where parameterization is allowed. You can numerically calculate extrema and partial derivatives.

The VIs on this palette can return mathematics error codes.

Palette ObjectDescription
Eval Formula NodeSimilar to the Formula Node but with variables that can be entered on the front panel. Refer to Formula Parsing VIs in More Detail for more information on the differences between the Eval Formula Node VI and the Formula Node.
Eval Formula StringInterprets a string as a numeric calculation and determines the result.
Eval Multi-Variable ArrayCalculates the function values of a given function at an arbitrarily given set of n dimension points.
Eval Multi-Variable ScalarCalculates exactly one function value based on a given formula.
Eval Parsed Formula NodeSeparates the parsing process from the evaluating process of the Eval Formula Node VI and improves the run-time behavior of a program containing Eval Formula Node VIs at different locations.
Eval Parsed Formula StringTakes the output of the Parse Formula String VI and fixes input values to calculate function values.
Eval Polar to RectCalculates the values of a polar parametric curve in 2D.
Eval Polar to Rect Optimal StepOperates like the Eval Polar to Rect VI but with a significantly higher degree of accuracy.
Eval Single-Variable ArrayCalculates an array of function values at given points in a given interval by y[i] = f(x[i]) for i = 1, …n, where f is the 1D function given by the user formula.
Eval Single-Variable ScalarCalculates exactly one function value of a given 1D function y = f(x), where f is the function specified by the user formula.
Eval X-Y-Z(a,t1,t2)Describes a surface in 3D with two variables running over two different intervals.
Eval X-Y-Z(t1,t2)Describes a surface in 3D with two variables running over two different intervals.
Eval X-Y(a,t)A generalized version of the Eval X-Y(t) VI with the possibility of adding some parameters into the formula.
Eval X-Y(t)Calculates the values of a function (f(t), g(t)), where t runs over an interval. Both components are given by Formulas. The t-values are chosen equidistantly in the interval.
Eval X-Y(t) Optimal StepCalculates the values of a more complex function (f(t),g(t)), where t runs over an interval. Both components are given by Formulas.
Eval y=f(a,x)A generalized version of the Eval y=f(x) VI with the possibility of adding some parameters into the formula.
Eval y=f(a,x1,x2)Calculates a 2D array of function values defined on a grid.
Eval y=f(x)Calculates the values of a 1D function given by a formula at equidistant points in an interval.
Eval y=f(x) Optimal StepCalculates the values of a more complex 1D function given by a formula.
Eval y=f(x1,x2)Calculates a 2D array of function values defined on a grid.

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