Why incorrect sampling with weighted randsample?

Depending on the distribution of the weights w used in randsample(population,k,true,w), the random sampling seems to be incorrect. For example, this problem arises if the weights are as weight2 below, but works correct with weight1:

%% --------------------------------------------------------- %%

values = [-5:5];

weight1 = [0.02 0.03 0.05 0.1 0.0 0.2 0.2 0.1 0.05 0.03 0.02];

weight2 = [0.02 0.00 0.05 0.1 0.35 0.28 0.2 0.0 0.00 0.00 0.00];

n = 1000000;

sample1 = randsample(values,n,true,weight1);

sample2 = randsample(values,n,true,weight2);

%% --------------------------------------------------------- %%

Has anyone else experienced this problem? Is there a workaround?

Best regards Kristin

Answer 1

[the cyclist]

Can you please explain the evidence that makes you say that "the random sampling seems to be incorrect"?

When I run the commands

figure
hist(sample1,values)

figure
hist(sample2,values)

the results look as I would expect.

[Kristin]

I'm so sorry, I made a simple mistake in plotting the distributions. Your reply helped me to see my mistake!

Thanks for taking your time!

/Kristin

[the cyclist]

The best form of thanks is the acceptance of an answer. :-)