read_from_file() [1/2]

template<typename T >

void cntr::function< T >::read_from_file

(

const char *

file

)

Read the function data from a txt file

Purpose

Read the function from a txt file. The data file is probably written by print_to_file method, or is assumed to have the same format.

Parameters

file	the file name

Definition at line 745 of file cntr_function_impl.hpp.

                                                 {
    int i, n, l, size1, sg;
    double real, imag;
    std::string s;
    std::ifstream out;
    out.open(file, std::ios::in);
    if (!(out >> s >> n >> size1)) {
        std::cerr << "read function from file " << file << " error in file"
                  << std::endl;
        abort();
    }
    if (n > nt_ || size1 != size1_)
        resize(n, size1);
    sg = element_size_;
    for (i = -1; i <= n; i++) {
        for (l = 0; l < sg; l++) {
            if (!(out >> real >> imag)) {
                std::cerr << "read function from file " << file
                          << " error at  t= " << i << std::endl;
                abort();
            }
            ptr(i)[l] = std::complex<T>(real, imag);
        }
    }
    out.close();
}