Semi-logarithmic plots
Syntax
semilogx(Y)
semilogx(X1,Y1,...)
semilogx(X1,Y1,LineSpec
,...)
semilogx(...,'PropertyName',PropertyValue,...)
h = semilogx(...)
semilogy(...)
h = semilogy(...)
Description
semilogx
and semilogy
plot data as logarithmic scales for the x- and y-axis, respectively. logarithmic
semilogx(Y)
creates a plot using a base 10 logarithmic scale for the x-axis and a linear scale for the y-axis. It plots the columns of Y
versus their index if Y
contains real numbers. semilogx(Y)
is equivalent to semilogx(real(Y)
, imag(Y))
if Y
contains complex numbers. semilogx
ignores the imaginary component in all other uses of this function.
semilogx(X1,Y1,...)
plots all Xn
versus Yn
pairs. If only Xn
or Yn
is a matrix, semilogx
plots the vector argument versus the rows or columns of the matrix, depending on whether the vector's row or column dimension matches the matrix.
semilogx(X1,Y1,LineSpec
,...)
plots all lines defined by the Xn,Yn,LineSpec
triples. LineSpec
determines line style, marker symbol, and color of the plotted lines.
semilogx(...,'PropertyName
',PropertyValue,...)
sets property values for all Line graphics objects created by semilogx
.
semilogy(...)
creates a plot using a base 10 logarithmic scale for the y-axis and a linear scale for the x-axis.
h = semilogx(...) and h = semilogy(...)
return a vector of handles to Line graphics objects, one handle per Line.
Remarks
If you do not specify a color when plotting more than one line, semilogx
and semilogy
automatically cycle through the colors and line styles in the order specified by the current Axes ColorOrder and LineStyleOrder properties.
You can mix Xn,Yn
pairs with Xn
,Yn
,LineSpec
triples, for example,
semilogx
(X1,Y1,X2,Y2,LineSpec
,X3,Y3)
Examples
A simple semilogy
plot is:
x = 0:.1:10;
semilogy(x,10.^x)
See Also
line
, LineSpec
, loglog
, plot
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