EDN

Frequency domain tutorial, part 2: complex signals and spectral diagrams

Figure 4. A snapshot, in time, of two complex numbers whose exponents, and thus their phase angles, change with time. The notion of negative frequency is often troubling to engineers who've spent so ...
EDN

Frequency domain tutorial, part 1: Dealing with ambiguity

This series is drawn from the course “DSP Made Simple for Engineers.” For more information, see Besser Associates. This article is also available as a PDF Part 2 introduces quadrature (complex) ...
BBC

Calculating the mean, mode and range from a frequency table

Frequency tables can be used to help present sets of data. There are 4 children aged 10, which gives a total age of 40 in that category. There are 6 children aged 11, which gives a total age of 66 in ...
Simon Fraser University

Generating a One-way Frequency Table

The one-way frequency table task can generate tables for both numeric and character columns. However, if you have a numeric column with many distinct values, the resulting table may not be informative ...
Simon Fraser University

Example 28.1: Creating an Output Data Set with Table Cell Frequencies

The output data set (Output 28.1.3) contains frequency counts and percentages for the last table. The data set also includes an observation for the zero cell count (SPARSE) and a variable with the ...
Nature

allele frequency

The allele frequency represents the incidence of a gene variant in a population. Alleles are variant forms of a gene that are located at the same position, or genetic locus, on a chromosome. An allele ...