How to interpolate only zeros in 2D array without change nonzero values using scipy griddata?
I have 2D zeros array MxN (M is not equal to N). I placed some values in the array and now i would like to interpolate the missing data (the zeros).
i'm trying to use scipy griddata but the result of my code change dramatically the values (max value = 80 turn to 40). my question is, whats wrong with my code? what am i missing?
Please see my code below.
import numpy as np
import scipy
from scipy.interpolate import griddata
R = np.linspace(0.0, 10, num=100) #those are the columns
T = np.arange(37, 80, 1) #those are the rows
grid_x, grid_y = np.meshgrid(T,R) #those are the new grid for interpolation
#data_interpolated is the zeros matrix with my data
tmp_float = data_interpolated.astype(float, order='K')
points = np.array(np.nonzero(tmp_float)) #find nonzeros values indexs
values = tmp_float[np.nonzero(tmp_float)] #find the values in those indexs
#interpolate
interpolated_data = griddata(points.transpose(), values, (grid_x, grid_y),
...method='linear')
python-2.7
asked Jan 18 at 18:51
alonalon
11
add a comment |
I have 2D zeros array MxN (M is not equal to N). I placed some values in the array and now i would like to interpolate the missing data (the zeros).
i'm trying to use scipy griddata but the result of my code change dramatically the values (max value = 80 turn to 40). my question is, whats wrong with my code? what am i missing?
Please see my code below.
import numpy as np
import scipy
from scipy.interpolate import griddata
R = np.linspace(0.0, 10, num=100) #those are the columns
T = np.arange(37, 80, 1) #those are the rows
grid_x, grid_y = np.meshgrid(T,R) #those are the new grid for interpolation
#data_interpolated is the zeros matrix with my data
tmp_float = data_interpolated.astype(float, order='K')
points = np.array(np.nonzero(tmp_float)) #find nonzeros values indexs
values = tmp_float[np.nonzero(tmp_float)] #find the values in those indexs
#interpolate
interpolated_data = griddata(points.transpose(), values, (grid_x, grid_y),
...method='linear')
python-2.7
asked Jan 18 at 18:51
alonalon
11
add a comment |
I have 2D zeros array MxN (M is not equal to N). I placed some values in the array and now i would like to interpolate the missing data (the zeros).
i'm trying to use scipy griddata but the result of my code change dramatically the values (max value = 80 turn to 40). my question is, whats wrong with my code? what am i missing?
Please see my code below.
import numpy as np
import scipy
from scipy.interpolate import griddata
R = np.linspace(0.0, 10, num=100) #those are the columns
T = np.arange(37, 80, 1) #those are the rows
grid_x, grid_y = np.meshgrid(T,R) #those are the new grid for interpolation
#data_interpolated is the zeros matrix with my data
tmp_float = data_interpolated.astype(float, order='K')
points = np.array(np.nonzero(tmp_float)) #find nonzeros values indexs
values = tmp_float[np.nonzero(tmp_float)] #find the values in those indexs
#interpolate
interpolated_data = griddata(points.transpose(), values, (grid_x, grid_y),
...method='linear')
python-2.7
asked Jan 18 at 18:51
alonalon
11
I have 2D zeros array MxN (M is not equal to N). I placed some values in the array and now i would like to interpolate the missing data (the zeros).
i'm trying to use scipy griddata but the result of my code change dramatically the values (max value = 80 turn to 40). my question is, whats wrong with my code? what am i missing?
Please see my code below.
import numpy as np
import scipy
from scipy.interpolate import griddata
R = np.linspace(0.0, 10, num=100) #those are the columns
T = np.arange(37, 80, 1) #those are the rows
grid_x, grid_y = np.meshgrid(T,R) #those are the new grid for interpolation
#data_interpolated is the zeros matrix with my data
tmp_float = data_interpolated.astype(float, order='K')
points = np.array(np.nonzero(tmp_float)) #find nonzeros values indexs
values = tmp_float[np.nonzero(tmp_float)] #find the values in those indexs
#interpolate
interpolated_data = griddata(points.transpose(), values, (grid_x, grid_y),
...method='linear')
python-2.7
python-2.7
asked Jan 18 at 18:51
alonalon
11
asked Jan 18 at 18:51
alonalon
11
asked Jan 18 at 18:51
alonalon
11
asked Jan 18 at 18:51
alonalon
11
asked Jan 18 at 18:51
alonalon
11
11
add a comment |
add a comment |
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