python - Efficient way to loop through numpy array -


hi have array number of nan values. looking way estimate values nan values through plane defined other finite data. plane covering full dimension more 1000*1000 exaggeration of data. idea loop through each nan value location window of 20*20 , find plane defined data avialable in window , estimate value @ center of window. process takes quite time process. looking if suggest me efficient way it. thankful.

dim = np.shape(data) row, col = np.where(np.isnan(data)) = row > 10 b = row < dim[0] - 10 c = col > 10 d = col < dim[1] - 10 row = row[a & b & c & d] col = col[a & b & c & d] interdata = np.zeros(np.shape(data)) interdata[np.isfinite(data)] = data[np.isfinite(data)] ii,jj in zip(row,col):         block = data[ii - 10:ii + 10, jj - 10:jj + 10]  # data in 11 11 window         if not np.all(np.isnan(block)):             block[block > 2 * np.median(                 block[np.isfinite(block)])] = np.nan  # replace outliers greater twice median nan.             pointvalue = block[np.isfinite(block)]             loc = np.ones((pointvalue.shape[0], 3))             loc[:, 0:2] = np.transpose(np.where(np.isfinite(block)))             c, _, _, _ = sp.linalg.lstsq(loc, pointvalue) # plane fitting             interdata[ii, jj] = c[0] * 10 + c[1] * 10 + c[2] # estimation of value coefficients defining plane

it might somehow duplicate question looked lot of similar questions have been asked before. of them dealing continuous data avoiding loop worked them.

you starting, far see, wrong premise: row , col independent! need rows , columns [a & b & c & d]. otherwise accepting rows of points , columns of other points. loop on each element of rows , within it, each elements of columns. doing nxn operations n nan points! if assume wrong points (250, 430) , (160, 470) "fixing": (250, 430), (250, 470), (160, 470) , (160, 430). recommend: 

whr = numpy.where( (col < ...) & (col > ...) & (row < ...) & (row > ...)) rr,cc in zip(row[whr],col[whr]):

Comments

Post a Comment

Popular posts from this blog

c++ - Difference between pre and post decrement in recursive function argument -

i have following sample code used pre-decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(--c); cout << c << endl; return; } } this function give output input 4 : dp3 dp2 dp1 dp0 0 1 2 3 but when use post decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(c--); cout << c << endl; return; } } output goes in infinite loop dp4 can explain me in detail why happens ? this happens because function(c--) called same value of c , when finishes c decremented. recursively called, hence called same value no chance of return , hit stack overflow error. assume this, int x = 1, y = 0; y = x++ result y == 1 , x == 2. if y = ++x , bot x , y 2.
Read more

php - Nothing but 'run(); ' when browsing to my local project, how do I fix this? -

i added new project. made mistake in projectname.conf file in sites-available apache2, led me reinstalling apache2. after reinstalling , re-enabling projects on every page of every project .. <body> run(); </body> .. i've run composer update, restarted service, restarted pc, checked config files, tried disabling new project. there nothing in error log, , access.log: 127.0.0.1 - - [15/may/2015:01:40:47 +0200] "get / http/1.1" 304 181 "-" "mozilla/5.0 (x11; ubuntu; linux x86_64; rv:38.0) gecko/20100101 firefox/38.0" maybe i'm forgetting apache2 reinstall? don't think did different last time installed it. looks haven't setup php correctly. take @ this great guide , maybe you're forgetting link php config apache2.
Read more

php - How can I echo out this array? -

i don't know how go grabbing data in variable , put foreach loop. class tree{ private $info = array( array('name'=>'jim','state'=>'nu','company'=>'nu','phone'=>array('cell'=>'5615111111','office'=>'5611111111'),'email'=>array('primary'=>'exs@example.com','ex@there.com')), array('name'=>'joe smith','city'=>'phoenix','phone'=>'4805551111','email'=>'jsmith@some_email.com'), array('name'=>'john doe','city'=>'chandler','company'=>'doe co.','email'=>array('jdoe@gmail.com','personal'=>'email@email.com'),'phone'=>'6025550002') ); } if you're inside of class, can access private variable using $this->variablename . example, i...
Read more