semilogy

Semilog plot (y-axis has log scale).

Syntax

  • semilogy(X, Y)

  • semilogy(X, Y, LineSpec)

  • semilogy(Y)

  • semilogy(Y, LineSpec)

  • semilogy(ax, ...)

  • semilogy(..., propertyName, propertyValue)

  • go = semilogy(...)

Input argument

  • X - Linear scale coordinates: scalar, vector or matrix.

  • Y - Log scale coordinates: scalar, vector or matrix.

  • LineSpec - Line style, marker, and/or color: character vector or scalar string.

  • ax - a scalar graphics object value: parent container, specified as a axes.

  • propertyName - a scalar string or row vector character. see help of 'line' for property list.

  • propertyValue - a value.

Output argument

  • go - a graphics object: line type.

Description

semilogy(X, Y) plots data using a base 10 logarithmic scale for the y-axis and a normal (linear) scale for the x-axis.

semilogy has the exact same syntax as the plot command.

Examples

f = figure();
x = 1:100;
y1 = x.^2;
y2 = x.^3;
semilogy(x,y1,'--',x,y2)
legend('x^2','x^3','Location','northwest')
f = figure();
y = [ 0.1    1     10
      0.2    2     20
      1.0    10    100
      10     100   1000
      1000   10000 100000];

semilogy(y)
grid on

See also

semilogx, line, plot, grid.

History

Author

Allan CORNET

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