Scilab Home page | Wiki | Bug tracker | Forge | Mailing list archives | ATOMS | File exchange
Change language to: Français - Português - 日本語

See the recommended documentation of this function

Scilab manual >> Graphics Library > geometric_shapes > xarrows

# xarrows

draw a set of arrows

### Calling Sequence

`xarrows(nx,ny,[arsize,style])`

### Arguments

nx,ny

real vectors or matrices of same size.

arsize

real scalar, size of the arrow head. The default value can be obtained by setting arsize to -1.

style

matrix or scalar. If `style` is a positive scalar it gives the color to use for all arrows. If it is a negative scalar then the current color is used. If it is a vector `style(i)` gives the color to use for arrow `i`.

### Description

`xarrows` draws a set of arrows given by `nx` and `ny`. If `nx` and `ny` are vectors, the ith arrow is defined by `(nx(i),ny(i))-->(nx(i+1),ny(i+1))`. If `nx` and `ny` are matrices:

```nx=[xi_1 x1_2 ...; xf_1 xf_2 ...]
ny=[yi_1 y1_2 ...; yf_1 yf_2 ...]```

the `k` th arrow is defined by `(xi_k,yi_k)-->(xf_k,yf_k)`.

`xarrows` uses the current graphics scale which can be set by calling a high level drawing function such as `plot2d`.

### Examples

```x=2*%pi*(0:9)/8;
x1=[sin(x);9*sin(x)];
y1=[cos(x);9*cos(x)];
plot2d([-10,10],[-10,10],[-1,-1],"022")
xset("clipgrf")
xarrows(x1,y1,1,1:10)
xset("clipoff")```

J.Ph.C.