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kakearney / contourfcmap-pkg

Create a filled contour plot in Matlab, with better color-to-value clarity
MIT License
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Regarding usage of this pkg to generate contour lines on an image. #5

Closed sparshgarg23 closed 3 years ago

sparshgarg23 commented 3 years ago

Hi,don't know if you still keep track of the issues but here goes. The function accepts x,y and z as input arguments. Let's say I have an image of dimension 71x61,then how should I feed that image as an input to the function. Also I would like to extract the contours at a specific level for further processing, for example in matlab contourf I can generate contour a say level 240,the output of this is a matrix of 2xN dimension which indicates the points that make up the contour at that level,any idea on how I can do the same using this package. Thanks and I hope to hear from you soon. Also,currently the contour I am getting from contourf tends to have a straight line running from one end to another as shown in the below image.Any reason why this is happening. my_output_from_contourf

kakearney commented 3 years ago

How to contour an image without x/y coordinates: To mimic the behavior of contour/contourf/etc. with a single input, set x = 1:size(z,2) and y = 1:size(z,1) (where z is your 71 x 61 image matrix).

Extracting contours: The 2xN contour matrix is returned in the c field of the output structure.

Straight line at bottom: I can't hypothesize on this without actually seeing your data.