matching two matrix with minimum tolerance

a=[0.151418289466622,0.157550272879153,0.164969442201943,0.178618980283435,0.184038910507376,0.185170768702784,0.180965222444822,0.179417614182600,0.179080801809376,0.189674592213221,0.189079438297340,0.192627792926085,0.190608065770002,0.189569497576109,0.184750857017359,0.184783149710191,0.187491320783671,0.184663702765154,0.183614370340317,0.180119836866292,0.174400015443593,0.169373266419925,0.170556398097724,0.167830286639338,0.169045711009969,0.171532461715258,0.173317923462902,0.173278454616107,0.171399702866948,0.171331529404303,0.166964519682180,0.160400926627234,0.158990705694957,0.155009701019144,0.153790688571531,0.151699199875820,0.151418289466622;0.0925151027059182,0.106398906195851,0.117220826258827,0.112729741110032,0.108506254467163,0.102562931866968,0.0961151976800784,0.0905363516643052,0.0744918456113631,0.0565818997125352,0.0553377707260530,0.0523153561458900,0.0502238674501794,0.0508226094430418,0.0441585502326185,0.0423085030993110,0.0402995401741714,0.0373714560001764,0.0385868803708079,0.0385258830621250,0.0363698089807500,0.0416282757405304,0.0445276552986745,0.0475644221867627,0.0486137546115995,0.0710701140816177,0.0748025010410647,0.0770636697595516,0.0786758634074373,0.0825815184666419,0.0853840199462896,0.0844469583125276,0.0827773554329403,0.0870259586146789,0.0861821869824317,0.0882019141385156,0.0925151027059182]
b=[0.174533001196354,0.169958671196354,0.171137641196354,0.168542901196354,0.169521061196354,0.172020101196354,0.173819901196354,0.173774461196354,0.171895711196354,0.171826781196354,0.167078011196354,0.160141801196354,0.158971341196354,0.155079701196354,0.153843161196354,0.152185581196354,0.151925201196354,0.157988931196354,0.165169641196354,0.178380181196354,0.183582971196354,0.184641891196354,0.180504121196354,0.178919041196354,0.178577921196354,0.189108411196354,0.188462391196354,0.191898401196354,0.190519581196354,0.189428551196354,0.184248021196354,0.184287511196354,0.186736071196354,0.184684371196354,0.183839791196354,0.180024511196354,0.174533001196354;0.0369542876197883,0.0417394776197883,0.0446286576197883,0.0475190876197883,0.0483635876197883,0.0709308076197883,0.0746932176197883,0.0772968876197883,0.0789090776197883,0.0828577976197883,0.0859052876197883,0.0849150276197883,0.0835292876197883,0.0876825076197883,0.0868265876197883,0.0884272976197883,0.0924252276197883,0.106154487619788,0.116628577619788,0.112281937619788,0.108227657619788,0.102667327619788,0.0963234876197883,0.0906095576197883,0.0743599076197883,0.0565569976197883,0.0552065576197883,0.0522798276197883,0.0508520176197883,0.0514810176197883,0.0443164776197883,0.0420536176197883,0.0402372476197883,0.0381126376197883,0.0390908976197883,0.0390242976197883,0.0369542876197883]
ww=[];
tol=0.0001;
 for j=1:length(a)
 th=a(j,1);
 [ii,jj]=find(abs(b-th)<tol); %points of polygons 1 in polygon 2
         if length(ii)>1
             tol1=0.00001;
              th1=a(j,2);
             c=b(ii,:);
             [ii,jj]=find(abs(c-th1)<tol1);
         end
 w=[a(j,:),b(ii,:)];
 ww=[ww;w];
 end

i m trying to campare two matrics(x y coordinates) and make a new with high precision . i first took the x coordinates of a but it found those coordinates twice in b so i tried to campare there y coordinates as well but some thing is wrong with the tolerance is guess.. i just want to campare matrix a with b and make new matrix say "ww" which has matching b infront of a for every x y coordinate. i aslo tried" ismembertol " but it also founds some values twice instead of finding them only once due to tolerance

[Walter Roberson]

?? Your a and b matrices are bit-for-bit identical.

[Kevin Phung]

can you be more clear? My understanding is that you want to compare each element in a with b, so a(1) with b(1) , a(2) with b(2), etc. What do you want to do if they match within tolerance? Are you trying to store that index into a matrix W?

Also, your vector a is the same as b..

[jahanzaib ahmad]

@ Walter Roberson i corrected them .sorry but i m trying for last 3 hours .i m doing so because i posted another question today about polyshapes and polybuffer . because i m not getting the coordinates of polybuffer in the same order i m making them in order .but want to do it very accuratley

[jahanzaib ahmad]

@Kevin Phung they are the coordinates x and y . so i want to match x and y of " a "with x and y of "b" . not the indiviuals ....but what i triedwas for each x and y not x,y at same time .please

[Kevin Phung]

you say (x,y) of a, but a is a one dimensional vector