它使用x和y轴的对数刻度生成向量x和y的图。

句法

loglog(Y)// It should plot the columns of Y versus their index if Y includes real numbers. If Y includes complex numbers, loglog(Y) and loglog(real(Y), imag(Y)) are equivalent.

loglog(X1, Y1, ...)// It plots all Yn versus Xn pairs.

loglog(X1, Y1, LineSpec, ...)// It plots all the lines described by the Xn, Yn, LineSpec triples, where LineSpec determine line type, marker symbol, and color of the plotted lines.

loglog(..., 'PropertyName', PropertyValue, ...)// It sets line property values for all the charting lines created.

loglog(ax, ...)// It generates the line in the axes specified by ax instead of in the current axes (gca). The option ax precedes any of the input argument combinations in the previous syntaxes.

h = loglog(...)// It returns a column vector of chart line objects.

例子

使用对数刻度的x轴和y轴创建图。

x=e^t, y=100+e^2t, 0≤t≤2π

t=linspace(0, 2*pi, 200);

x=exp(t)

y=100+exp(2*t);

loglog(x, y), grid

输出