¡@
python Programming Glossary: scalarhttp://stackoverflow.com/questions/10615901/trim-whitespace-using-pil getpixel so you don't need to pass the colour. Subtracts a scalar from the differenced image this is a quick way of saturating..
python tilde unary operator as negation numpy bool array http://stackoverflow.com/questions/13600988/python-tilde-unary-operator-as-negation-numpy-bool-array input treated as an int even if it's boolean . Hence for a scalar boolean ~ is not treated as a logical negation. Not that the.. True It is extremely annoying that I must use not on a scalar but not won't work to negate an array. Then for an array I must.. for an array I must use ~ but ~ won't work to negate a scalar... python numpy boolean ndarray share improve this question..
Differences between isinstance() and type() in python http://stackoverflow.com/questions/1549801/differences-between-isinstance-and-type-in-python slice them ... but you generally want to treat them as scalar types it's somewhat incovenient but a reasonably frequent use.. use case to treat all kinds of strings and maybe other scalar types i.e. ones you can't loop on one way all containers lists.. is something like if isinstance x basestring return treatasscalar x try return treatasiter iter x except TypeError return treatasscalar..
How can I quantify difference between two images? http://stackoverflow.com/questions/189943/how-can-i-quantify-difference-between-two-images will have a vector of color values per point rather than a scalar value as in grayscale image. You need more attention when writing..
Integrate stiff ODEs with Python http://stackoverflow.com/questions/2088473/integrate-stiff-odes-with-python explanation first consider the simple case of Y being a scalar. You run the system to get 3 Y T points. Fit an exponential..
Precomputed Kernels with LibSVM in Python http://stackoverflow.com/questions/2474460/precomputed-kernels-with-libsvm-in-python The kernel function takes two vectors and gives a scalar so you can think of a precomputed kernel as a nxn matrix of.. you can think of a precomputed kernel as a nxn matrix of scalars. It's usually called the kernel matrix or sometimes the Gram..
How can I repeat a string in Perl? http://stackoverflow.com/questions/277485/how-can-i-repeat-a-string-in-perl bits by the way. Binary x is the repetition operator. In scalar context or if the left operand is not enclosed in parentheses..
Numpy interconversion between multidimensional and linear indexing http://stackoverflow.com/questions/3257619/numpy-interconversion-between-multidimensional-and-linear-indexing numpy.dot ndims numpy.arange ndims binassign The scalar product simply does 1 x0 5 x1 5 5 x2 This is done very efficiently..
Why is it not possible to create a practical Perl to Python source code converter? http://stackoverflow.com/questions/3399781/why-is-it-not-possible-to-create-a-practical-perl-to-python-source-code-converte mysub 5 type code source filters context list vs scalar and the way that called code can inspect this with wantarray..
Non biased return a list of n random positive numbers (>=0) so that their sum == total_sum http://stackoverflow.com/questions/3959021/non-biased-return-a-list-of-n-random-positive-numbers-0-so-that-their-sum desired total sum S a range of allowed values 0 B for each scalar value generate a random vector V of length N such that the random..
Try/catch or validation for speed? http://stackoverflow.com/questions/5589532/try-catch-or-validation-for-speed both as a Color class and as a Vector so when I add a scalar to the Color it should add that constant to each individual..
numpy float: 10x slower than builtin in arithmetic operations? http://stackoverflow.com/questions/5956783/numpy-float-10x-slower-than-builtin-in-arithmetic-operations allocated in chunks The key problem with comparing numpy scalar allocations to the float type is that CPython always allocates.. appears that numpy has 2 paths it can take when creating a scalar type fast and slow. This depends on whether the scalar type.. a scalar type fast and slow. This depends on whether the scalar type has a Python base class to which it can defer for argument..
Multivariate spline interpolation in python/scipy? http://stackoverflow.com/questions/6238250/multivariate-spline-interpolation-in-python-scipy interpolation in python Specifically I have a set of scalar data on a regularly spaced three dimensional grid which I need..
Using Colormaps to set color of line in matplotlib http://stackoverflow.com/questions/8931268/using-colormaps-to-set-color-of-line-in-matplotlib How does one set the color of a line in matplotlib with scalar values provided at run time using a colormap say jet I tried.. here and I think I'm stumped. values is a storted array of scalars. curves are a set of 1 d arrays and labels are an array of.. 'jet' cNorm colors.Normalize vmin 0 vmax values 1 scalarMap cmx.ScalarMappable norm cNorm cmap jet lines for idx in range..
How to create a list of random integer vector whose sum is x http://stackoverflow.com/questions/11380491/how-to-create-a-list-of-random-integer-vector-whose-sum-is-x 1000 is fairly straight forward import random def RunFloat Scalar 1000 VectorSize 30 RandomVector random.random for i in range.. VectorSize RandomVectorSum sum RandomVector RandomVector Scalar i RandomVectorSum for i in RandomVector return RandomVector.. it to the following import random def RandFloats Size Scalar 1.0 VectorSize Size RandomVector random.random for i in range..
How to determine a region of interest and then crop an image using OpenCV http://stackoverflow.com/questions/15693900/how-to-determine-a-region-of-interest-and-then-crop-an-image-using-opencv int i 0 i 4 i cv line img vertices i vertices i 1 4 cv Scalar 0 255 0 1 CV_AA cv imshow Original img cv waitKey 0 Set the..
Keeping large dictionary in Python affects application performance http://stackoverflow.com/questions/19391648/keeping-large-dictionary-in-python-affects-application-performance 2.7.5. There's no guarantee they'll always work this way Scalar objects no internal pointers are never tracked it's impossible..
How to detect a Christmas Tree? http://stackoverflow.com/questions/20772893/how-to-detect-a-christmas-tree 3 numpy array containing uint 0 255 color image hueleftthr Scalar constant to select maximum allowed hue in the yellow green.. allowed hue in the yellow green region huerightthr Scalar constant to select minimum allowed hue in the blue purple region.. minimum allowed hue in the blue purple region satthr Scalar constant to select minimum allowed saturation valthr Scalar..
Python and OpenCV. How do I detect all (filled)circles/round objects in an image? http://stackoverflow.com/questions/5368449/python-and-opencv-how-do-i-detect-all-filledcircles-round-objects-in-an-image circles i 2 draw the circle center circle img center 3 Scalar 0 255 0 1 8 0 draw the circle outline circle img center radius.. 0 1 8 0 draw the circle outline circle img center radius Scalar 0 0 255 3 8 0 namedWindow circles 1 imshow circles img return.. circles i 2 draw the circle center circle img center 3 Scalar 0 255 0 1 8 0 draw the circle outline circle img center radius..
|