How to use abs, sqrt etc on OperateOnAll with OjAlgo?

Question

I'm trying to take square root on all elements in a matrix A by doing the following command.

A.operateOnAll()

But the argument must be UnaryFunction<N> and I don't know how to create that. I reading the API documention, but still don't know how to create a sqrt procedure for matrix A

https://javadoc.scijava.org/ojAlgo/index.html?org/ojalgo/function/FunctionSet.html

apete · Accepted Answer · 2020-05-17T20:01:52.600

1

UnaryFunction<Double> modifier = PrimitiveMath.ROOT.parameter(2);

// To modify A in place
A.modifyAll(modifier);

// The results in another matrix
A.operateOnAll(modifier).supplyTo(B);

// To have a new results matrix created for you
MatrixStore<Double> C = A.operateOnAll(modifier).get();

// If A if of an immutable type like Primitive64Matrix
DenseReceiver mutable = A.copy();
mutable.modifyAll(modifier);
Primitive64Matrix B = mutable.get();

edited May 17 '20 at 20:01

answered May 17 '20 at 13:01

apete

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Tackar! Can I use something similar for Primitive64Matrix? – euraad May 17 '20 at 16:27
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That's an immutable type! I edited the example to show what you need to do in that case. – apete May 17 '20 at 20:03

How to use abs, sqrt etc on OperateOnAll with OjAlgo?

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