Mandel | Arduino Mandelbrot and Julia Fractals for FastLED

As already pointed out by @paddy you have to calculate cy directly using the equation cy = MIN_Y + j * fDeltaY; and get rid of many shared variables, as they cause data race. Generally, it is always recommended to define your variables in their minimal required scope. I also suggest to calculate cx similarly (cx = MIN_X + i * fDeltaX;) it makes possible to use collapse(2) clause in your #pragma omp for directive and IMO it is also easier to understand your code. You should use reduction in case of nTotalIterationsCount only. Please also make sure that png_plot is threadsafe. The code should look something like this:

Here is my hypothesis: Your error results from one or more of the 15 sample columns in the count table (not Metabolite or KEGG) being incorrectly rendered as something other than "numeric" variables.

Looking at the source code for omu_anova, the "Metabolite" column is first assigned to the rownames of the data frame and then the following line selects only the columns in the count data that are numeric.

Presumably, P is returning a bytes object, while 'BM' remains a str. Simplest fix is to change 'BM' to b'BM', but given this code likely comes from Python 2, it probably expects to iterate over length 1 strings, not ints, so it might make sense to .decode('latin-1') the result of P to get a str that represents the raw bytes.

Porting from Python 2 to Python 3 when str was used in Python 2 in a way that's not entirely text or raw bytes oriented is tricky; this is one of those cases.

Here is what should help:

If I understand you correctly, you want to make the point where the mouse is located a new center of the image, and change the scale of the image by a factor of 1.03. I would try something like that:

• Your position() and mouse_move() functions remain the same.

• in zoom_control() just change the way how you set the new value of interpolation, it should not be a fixed constant, but should be based on its current value. Also, pass the new scaling factor to the apply_zoom():

One of the things the CLR can do pretty well for interop with C/C++ code is marshalling data structures between managed and unmanaged code. Since strings are pretty important, a lot of work went into making strings marshal as well as possible.

As a side note, you're using void* for the context object that's created by init and passed to write. Since you're just handing it back, you can replace it with IntPtr and avoid unsafe blocks altogether. IntPtr is always the size of a pointer in the current architecture.

First, let's change the declaration of the imported functions. CharSet.Ansi tells it to marshal strings as ANSI. The ptr parameter becomes IntPtr

This is not an answer, but please do this: