Plot boxplot giving it the median, range and quartiles

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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?

Answers (2)

the cyclist
the cyclist on 2 Nov 2015
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)

Soleil Hernandez
Soleil Hernandez on 13 Jun 2016
how would this change if I was putting 3 box plots on the same figure?
  1 Comment
Salaar Khan
Salaar Khan on 16 Feb 2022
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)

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