MATLAB: How to use function “find” over matrices

find

Suppose x = rand(1e5,1e5);
I want to find the lowest number in each column of x without using for loop.
Is it possible?

Best Answer

"find the first value in each column which lis ess than 0.25 but greater than 0.2."
>> x = rand(13,7)
x =
   0.833676   0.654529   0.869031   0.922756   0.586565   0.278136   0.595271
   0.335144   0.936490   0.552751   0.676447   0.924786   0.813253   0.388776
   0.171351   0.992074   0.426227   0.814150   0.599205   0.378885   0.470132
   0.368957   0.162066   0.044178   0.911514   0.431260   0.111011   0.348894
   0.787866   0.150796   0.783209   0.406310   0.116503   0.232302   0.350849
   0.676606   0.782741   0.251472   0.223849   0.872576   0.665249   0.287961
   0.176415   0.750830   0.958001   0.274026   0.107420   0.716966   0.612980
   0.030644   0.103396   0.297286   0.256401   0.902245   0.486087   0.812681
   0.563573   0.414845   0.615615   0.335131   0.589437   0.396942   0.780523
   0.994748   0.314337   0.721215   0.946815   0.446822   0.252527   0.593235
   0.438298   0.516228   0.978322   0.183097   0.011558   0.731435   0.948024
   0.496606   0.172242   0.224708   0.339960   0.425773   0.730056   0.809002
   0.234744   0.195880   0.086287   0.702632   0.708232   0.489843   0.558111
>> y = x>0.2 & x<0.25;
>> [row,col] = find(y & cumsum(y,1)==1)
row =
   13
   12
    6
    5
col =
    1
    3
    4
    6
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