How can I delete values from a matrix?

Hello I've just started using Matlab few months ago so I hope somebody can help me with my problem. My problem is that I have some flow measurements, and I need to remove all values below 0.01 l/s, so Q>0.01 l/s. It's a large matrix (1135266x3 double), and it still needs to be a matrix with 3 columns after removing the values, so I guess I need to delete rows that contain values from 0.01 and below. I've tried to look it up online but couldn't find anything that works. Thanks :)

Answer 1

[Geoff Hayes]

Azra - how does your logic of removing elements less than 0.01 apply to the following example

 flowData = [1 3     4;
             5 0.001 6];

We can use

 idcs = find(flowData<0.01);

to find all indices of flowData where there is an element less than 0.01. But, for this example, we can't remove the element else we will no longer have a row of three columns. Can we replace this with NaN instead? Something like

 flowData(flowData<0.01) = NaN;

where flowData now becomes

 flowData =

     1     3     4
     5   NaN     6

Or, do we delete the whole row if at least one element is less than 0.01? Something like

 % find the rows of flowData that have an element less than 0.01
 [rowIdcs, ~] = find(flowData<0.01);

 % remove those rows from flowData that have at least one element less than 0.01
 flowData(rowIdcs,:) = [];

[Azra Ferhatbegovic]

It's works! Thank you so much!

And, I can use both actually. Thanks once again :)