📄 gslib help histplt.htm
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<HTML><HEAD><TITLE>GSLIB Help: HISTPLT</TITLE>
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<H2>GSLIB Help Page: HISTPLT</H2></CENTER>
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<STRONG>Description:</STRONG>
<UL>
<LI><TT>histplt</TT> has been custom written to generate some univariate
statistical summaries and a visual output that is compatible with a
PostScript display device. The input data is a variable from a simplified
Geo-EAS input file where the variable in another column can act as a weight
(declustering weight, specific gravity, thickness for 2-D data,...). These
weights do not need to add up to one. Minimum and maximum trimming limits
can be set to remove missing values and outliers. The program will
automatically scale the histogram. The user can choose to set the minimum
and maximum histogram limits, number of classes, and whether or not to use a
logarithmic scale. </LI></UL>
<DT><IMG height=14 alt=o src="GSLIB Help HISTPLT.files/ball.red.gif" width=14>
<STRONG>Parameters:</STRONG>
<UL>
<LI><B>datafl:</B> the data file in a simplified Geo-EAS format.
<LI><B>ivr</B> and <B>iwt:</B> column number for the variable and the
weight. If <B>iwt</B> less than or equal to 0, equal weighting is
considered.
<LI><B>tmin</B> and <B>tmax:</B> all values strictly less than <B>tmin</B>
and strictly greater than <B>tmax</B> are ignored.
<LI><B>outfl:</B> file for PostScript output.
<LI><B>hmin</B> and <B>hmax:</B> minimum and maximum plotting limits for the
variable axis (abscissa). These do not have to be compatible with
<B>tmin</B> and <B>tmax</B> Values that are less than <B>hmin</B> or greater
than <B>hmax</B> will appear just beyond either end of the histogram plot.
They contribute to the statistics calculated. Setting <B>hmin</B> greater
than <B>hmax</B> will cause the program to set the limits to the minimum and
maximum data values encountered.
<LI><B>fmax:</B> maximum frequency value for plotting vertical axis. The
maximum will be determined automatically if <B>fmax</B> is set less than
0.0. This option is used to force the same histogram axis for different sets
of data.
<LI><B>ncl:</B> the number of classes.
<LI><B>ilog:</B> =0 then an arithmetic scaling of the variable scale is
used, =1 then a logarithmic scaling (base 10) is used.
<LI><B>icum:</B> =0 then a frequency histogram will be constructed, =1 then
a cumulative histogram will be constructed.
<LI><B>ncum:</B> the number of quantiles to plot when constructing a
cumulative histogram
<LI><B>ndec:</B> the number of decimal places to use for the statistics
annotated on the histogram plot (if set to 0, then the number will be
automatically determined).
<LI><B>title:</B> a 40-character title for the top of the plot.
<LI><B>pos:</B> positioning of statistics. At times it is desirable to move
the statistics from right to left to avoid overwriting the histogram bars
(<B>pos</B>=1 is the left and <B>pos</B>=1 is the right).
<LI><B>refval:</B> reference value for a box plot under the histogram. If
this value is within the allowable range specified by <B>tmin</B> and
<B>tmax</B> then a label on the horizontal <I>X</I> axis will not be plotted
and, instead, a box plot will be shown (outside whiskers at the 95%
probability interval, inside box at the 50% probability interval, vertical
solid line at the median, and black dot at the reference value specified by
<B>refval</B>) </LI></UL><IMG height=8 alt=---
src="GSLIB Help HISTPLT.files/line.blue.gif" width=652>
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