Histograms

hist(intvls, data) Returns a histogram of data − a vector representing the frequencies with which values in data fall into the intervals represented by intvls.

histogram(intvls, data) Returns a matrix with two columns. The first column contains midpoints of the intvls of the range min(data) ≤ value ≤ max(data) of equal length. The second column is identical to hist(intvls, data); the resulting matrix has intvls rows. The first column of histogram output is useful for plotting a horizontal axis for your histogram.

mode(A, B, C, ...) Returns the value in A, B, C, ... that occurs most often.

Arguments:

• intvls is either:
  • A vector of real interval endpoints in ascending order, such that the ith element of the returned vector is the number of points of data falling between the ith and (i + 1)th element of intvls.
  • An integer greater than zero indicating the number of subintervals of equal length.
• data is a vector of real data values.
• A, B, C, ... are arrays of arbitrary size. If more than one value occurs with the same frequency, the mode function returns an error, "multimodal."

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