Octave教程四：Plotting Data

octave:5>octave:5>octave:5> PS1 ('>> ')>> t = [0:0.01:0.98];>> y1 = sin(2*pi*4*t);>> plot(t,y1);>>

>> y2 = cos(2*pi*4*t);>> plot(t,y2);>>

>> plot(t,y1);>> hold on;>> plot(t,y2,'r');>>

>>>> xlable('time')error: 'xlable' undefined near line 1 column 1>> xlabel('time')>> ylabel('value')>> legend('sin','cos')>> title('my plot')>> cd 'C:\fakepath\octave4';>> print -dpng 'myplot.png'>>

>> close>>>>>> figure(1);plot(t,y1)>> figure(2);plot(t,y2)>> subplot(1,2,1); %Divides plot a 1*2 grid,access first element>> plot(t,y1);>> subplot(1,2,1); %Divides plot a 1*2 grid,access first element>> plot(t,y1);>> subplot(1,2,2);>> plot(t,y2);>>

>> axis([0.5 1 -1 1])>>

>> A = magic(5)A =   17   24    1    8   15   23    5    7   14   16    4    6   13   20   22   10   12   19   21    3   11   18   25    2    9>> imagesc(A)>>

>> imagesc(A),colorbar,colormap gray;>>

>> imagesc(magic(30)),colorbar,colormap gray;>>