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42 lines
926 B
ReStructuredText
42 lines
926 B
ReStructuredText
.. highlight:: c
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.. _Mapped:
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Simple functions on arrays
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==================================
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The following functions are mapped on the array (using :ref:`map`):
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`abs real imag pow cos sin tan cosh sinh tanh acos asin atan exp log sqrt floor`
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meaning that e.g. if `A` is an array,
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real(A) models :ref:`ImmutableCuboidArray`, with the same size and returns the real part of the elements.
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In other words, it applies the function term-by-term.
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.. note::
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These functions do NOT compute a new array in memory, they are lazy.
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Example :
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.. compileblock::
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#include <triqs/arrays.hpp>
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using triqs::arrays::matrix; using triqs::clef::placeholder;
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int main(){
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placeholder<0> i_; placeholder<1> j_;
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matrix<double> A(2,2);
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A(i_,j_) << i_ - j_ ;
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std::cout << "A = "<<A << std::endl;
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std::cout << "abs(A)= "<<matrix<double>(abs(A))<< std::endl;
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}
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