Scilab Function

errbar - add vertical error bars on a 2D plot

### Calling Sequence

  `errbar(x,y,em,ep)`

### Parameters

- `x,y,em,ep` : four matrices of the same size.

### Description

`errbar` adds vertical error bars on a 2D plot. `x` and `y` have the same meaning as in `plot2d` . `em(i,j)` and `ep(i,j)` stands for the error interval on the value `y(i,j)` : `[y(i,j)-em(i,j),y(i,j)+ep(i,j)]` .

Enter the command `errbar()` to see a demo.

### Examples

    t=[0:0.1:2*%pi]';
    y=[sin(t) cos(t)]; x=[t t];
    plot2d(x,y)
    errbar(x,y,0.05*ones(x),0.03*ones(x))

### See Also

`plot2d` ,

### Author

J.Ph.C.