Could anyone help me how to plot the graph with respect to x axis in normal form and one y axis in semilog and other y axis in normal form.

I am having the data in x,y1,y2

in graph i want to have x and y2 in normal and y1 should be in semilog.

When i used the command plotyy(x,y1,x,y2,'loglog')

all three appears to be in semilog

couly anyone help me how to make y1 alone in semilog and x and y2 in normal.

Answer 1

[Walter Roberson]

plotyy(x, y1, x, y2,'semilogy', 'plot')

[jaah navi]

The above command works perfectly.

could you help me how to have the axes lines and lines corresponding to values in black color.

As I can get the graph with different color.

But i need to have everything in black color.

Could you please help me on this.

[Walter Roberson]

plotyy(x, y1, x, y2, @(X,Y)semilogy(X,Y,'k'), @(X,Y)plot(X,Y,'k'))

[jaah navi]

It works.

Could you please help me to check with the following code:

x=1:5
y1=[ 3.5743 2.4635 1.6621 1.3403 0.5476 ];
y2=[3890000     4168000     4446000     4724000     4999000      ]
y3=[ 1.5543 1.1435 0.6421 0.2303 0.1476 ];
y4=[4190000    4454000    4718000    4982000    5346000    ]
figure
[hAx,hLine1,hLine2] = plotyy(x, y1, x, y2,@(X,Y)semilogy(X,Y,'k'), @(X,Y)plot(X,Y,'k'))
hold on;
[hAx,hLine3,hLine4] = plotyy(x, y3, x, y4,@(X,Y)semilogy(X,Y,'k'), @(X,Y)plot(X,Y,'k'))

when i run the above code the y axis value on the right is repeated more than one.

Could you please help me how to overcome it.

[Walter Roberson]

plotyy() always creates a new right axes; one of the advantages of the newer yyaxis() is that it only creates the second axes if needed.

You do not want a new axes created; you want to re-use the existing ones.

x=1:5
y1=[ 3.5743 2.4635 1.6621 1.3403 0.5476 ];
y2=[3890000     4168000     4446000     4724000     4999000      ]
y3=[ 1.5543 1.1435 0.6421 0.2303 0.1476 ];
y4=[4190000    4454000    4718000    4982000    5346000    ]
figure
[hAx,hLine1,hLine2] = plotyy(x, y1, x, y2,@(X,Y)semilogy(X,Y,'k'), @(X,Y)plot(X,Y,'k'))
hold(hAx,'on');
plot(hAx(1), x, y3, 'k'); %axes is already set to semilogy
plot(hAx(2), x, y4, 'k');