HISTOGRAM - Information Technology Laboratory | NIST
Graphics Commands
... HISTOGRAM
... HISTOGRAM
PURPOSE Generates a histogram.
DESCRIPTION A histogram is a graphical data analysis technique for summarizing the distributional information of a variable. The response variable is divided into equal sized intervals (or bins). The number of occurrences of the response variable is calculated for each bin. The histogram consists of: Vertical axis = frequencies or relative frequencies; Horizontal axis = response variable (i.e., the mid-point of each interval).
There are 4 types of histograms: 1. histogram (absolute counts); 2. relative histogram (converts counts to proportions); 3. cumulative histogram; 4. cumulative relative histogram.
The histogram and the frequency plot have the same information except the histogram has bars at the frequency values, whereas the frequency plot has lines connecting the frequency values.
SYNTAX 1
HISTOGRAM
RELATIVE HISTOGRAM
CUMULATIVE HISTOGRAM
CUMULATIVE RELATIVE HISTOGRAM
where is the variable of raw data values which will appear on the horizontal axis;
and where the ................
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