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