The problem of visualization of results of processing of experimental data arises in various branches of a science and technics. In particular, in a direct Fourier method - one of the most known methods of the decision of a flat problem of a computer tomography for visualization calculation of the Fourier sums one and two variables in the fixed system of points is essentially used. The fast Fourier transformation (FFT) in Matlab uses even number of Fourier factors while full Fourier sum uses odd number of Fourier factors. The similar situation arises at calculation in the fixed system of points of 2D Fourier sums. Therefore, for calculation of Fourier sums on set points in Matlab, some authors use incomplete Fourier sums that worsens visualization. In the given work are offered Matlab - programs of calculation with help FFT of full Fourier sums of one and two variables.