Plot boxplot giving it the median, range and quartiles

Hi, I need to plot similar to this:

(Multiple categories) however I have way too much data to store in memory. Is there a way I can calculate the median, range and quartiles for each category and then plot a boxplot rather than giving the function boxplot() all the data?

Or is there a "hold on" type method where I can plot each category side by side on the same figure but one after the other?

[yair suari]

Its a boxplot

[Mike Garrity]

Which is part of the Statistics toolbox.

Answer 1

[the cyclist]

Here's one way:

rng default
N = 10000;

data = randn(N,1);

figure
hold on

boxplot(data,'positions',1)

clear data

data = randn(N,1);

boxplot(data,'positions',2)

label = {'data1','data2'};

xlim([0.5 2.5])
set(gca,'XTick',[1 2],'XTickLabel',label)

Answer 2

[Soleil Hernandez]

how would this change if I was putting 3 box plots on the same figure?

[Salaar Khan]

rng default

N = 10000;

data = randn(N,1);

figure

hold on

boxplot(data,'positions',1)

clear data

data = randn(N,1);

boxplot(data,'positions',2)

label = {'data1','data2'};

clear data

data = randn(N,1);

boxplot(data,'positions',3)

label = {'data1','data2','data3'};

xlim([0.5 3.5])

set(gca,'XTick',[1 2 3],'XTickLabel',label)