# Matlab choose random color for plotting

I have 6 vectors which I want to plot. How I can make each plot with different color (random)? With the code below, the plot limited to one color for all six vectors.

```plot(x,y,'-rs','LineWidth',1,...
'MarkerEdgeColor','k',...
'MarkerFaceColor','g',...
'MarkerSize',5);
```

You can have PLOT automatically choose line colors for you. If all 6 of your vectors are the same length, you can put the x and y coordinates into N-by-6 matrices X and Y and pass these to PLOT. A different color will be used for each column:

```plot(X,Y,'-s');  %# Plots lines with square markers
```

You could also use some of the built-in colormaps to generate a set of colors, then use these when you plot each line separately. For example:

```cmap = hsv(6);  %# Creates a 6-by-3 set of colors from the HSV colormap
for i = 1:6     %# Loop 6 times
plot(X(:,i),Y(:,i),'-s','Color',cmap(i,:));  %# Plot each column with a
%#   different color
end
```

To create a random color map, you could do the following

```myMap = rand(nbColors, 3);
for i = 1:nbColors
plot(X(:,i),Y(:,i),'-s','Color',myMap(i,:));
end
```

However, as I stated in my comment to gnovice's answer, picking colors out of a colormap generally provides much more readable color combinations.