Boxplot - how to set x-axis position

Hi there.

Briefly, i have a set of 10 arrays (numeric values) of different sizes i want to plot in a boxplot.

I created a vector containing the whole data and grouped it using numeric values, specified by a grouping variable g (using the repmat routine i've found in the community).

I would the values in g to be the x-axis position of the boxes; now, the x labels show the right values but the matlab function boxplot just places the boxes in evenly spaced locations, regardless of the specific x-value.

the x values are: [48; 52; 53; 64; 68; 84; 86; 89; 90; 91] and i want the range [30 100] for the x-axis.

Is there a way to manually set the location of the boxes? I have access to an old version of Matlab (7.0 R14) that does not support the 'positions' parameter as input argument.

Thank you in advance.

Antonio Mancini