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Max and Min (G Dataflow)

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Last Modified: September 13, 2017

Compares two values and returns the maximum and minimum values.

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x

The value to compare. x must be of the same data type as y.

Data Type Changes on FPGA

When you add this node to a document targeted to an FPGA, this input has a default data type that uses fewer hardware resources at compile time.

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y

The value to compare. This input also supports waveforms.

Data Type Changes on FPGA

When you add this node to a document targeted to an FPGA, this input has a default data type that uses fewer hardware resources at compile time.

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max

The larger value.

Data Type Changes on FPGA

When you add this node to a document targeted to an FPGA, this output has a default data type that uses fewer hardware resources at compile time.

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min

The smaller value.

Data Type Changes on FPGA

When you add this node to a document targeted to an FPGA, this output has a default data type that uses fewer hardware resources at compile time.

Timestamps

This node accepts timestamp values if all inputs are timestamp values. If the inputs are timestamp values, the function returns the later time at the top and the earlier time at the bottom. You can change the comparison mode of this node.

Behavior When Comparing NaN Elements

In Compare Elements mode, when one or both inputs are NaN (Not-a-Number), this function produces the following results:

  • Both inputs are NaN-Both max and min return NaN
  • Only one input is NaN-Both max and min return the non-NaN value
  • Inputs are arrays—The node evaluates each pair of elements according to the previous rules

In Compare Aggregates mode, when one or both inputs are NaN (Not-a-Number), this function produces the following results:

  • Both inputs are NaN-Both max and min return NaN
  • Only one input is NaN-max returns x and min returns y
  • Inputs are arrays—If the node encounters a NaN element in either input array, max returns x and min returns y

Behavior with Array and Cluster Inputs

When using Max and Min to compare arrays and clusters, you can select a comparison mode. Note that Max and Min produces a different type of output than other Comparison nodes in each of the two comparison modes. In Compare Elements mode, rather than returning an array or cluster of Boolean values, Max and Min returns an array or cluster of the maximum elements and/or minimum elements. In Compare Aggregates mode, rather than returning a single Boolean value, Max and Min returns the maximum array or cluster and/or minimum array or cluster.

Parameters Compare Elements Comments Compare Aggregates Comments
First input array (x) [3,2,3,4] [3,2,3,4]
Second input array (y) [2,3,4,5] [2,3,4,5]
Maximum (max) [3,3,4,5] The node returns an array of the maximum elements from the two input arrays. [3,2,3,4] Because the first elements of the two input arrays are not equal, and because 3>2, the node stops and returns [3,2,3,4] as the maximum array.
Minimum (min) [2,2,3,4] The node returns an array of the minimum elements from the two input arrays. [2,3,4,5] Because the first elements of the two input arrays are not equal, and because 2<3, the node stops and returns [2,3,4,5] as the minimum array.

Where This Node Can Run:

Desktop OS: Windows

FPGA: DAQExpress does not support FPGA devices

Web Server: Supported in VIs that run in a web application

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