Matlab: extract numbers including decimals and sign
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I have a string in matlab that looks like this:<br>

    str =
    
        Z   1   -355.66338432    1
        Z   2      1.38339828     412    
        Z   3      9.00000000     412    
        Z   4    -10.27835665     312 22 - 1
        Z   5      3.00000000     612 2   2
        Z   6      6.53259554     612 2   2
        Z   7      5.00000000     812 33 - 2   
        Z   8      0.19040409     812 33 - 2   
        Z   9      2.00000000     812 3   3
        Z  10     -1.00534284     812 3   3
        Z  11      7.27727717     512 64 - 62  1

I want to extract the numbers in the third column but I can't seem to figure out the correct usage of regexp.

