seismic | Android device shake detection | Android library

This is not that much a problem of programming. It has to do more with the fact that you are using the physical quantities in a somewhat unusual way. Your plots are absolutely fine and correct.

What you seem to have misunderstood is the fact that you are talking about a 2D problem with a third dimension added for time. This is by no means wrong but if you try to append the snapshot of the 2D wave side-by-side you are using (again) the x spatial dimension to represent temporal variations. This leads to an inconsistency of the use of that coordinate axis. Now, to make this more intuitive, consider the two time instances separately. Does it not coincide with your intuition that all points on the 2D plane must have different amplitudes (unless of course the time has progressed by a multiple of the period of the wave)? This is the case indeed. Thus, when you try to append the two snapshots, a discontinuity is exhibited. In order to avoid that you have to either use a time step equal to one period, which I believe is of no practical use, or a constant time step that will make the phase of the wave on the left border of the image in the current time equal to the phase of the wave on the right border of the image in the previous time step. Yet, this will always be a constant time step, alternating the phase (on the edges of the image) between the two said values.

The same applies to the 1D case because you use the two coordinate axes to represent the wave (x is the x spatial dimension and y is used to represent the amplitude). This is what can be seen in your last plot.

Now, what would be the solution you may ask. The solution is provided by simple inspection of the mathematical formula of the wave function. In 2D, it is a scalar function of three variables (that is, takes as input three values and outputs one) and so you need at least four dimensions to represent it. Alas, we can't perceive a fourth spatial dimension, but this is not a problem in your case as the output of the function is represented with colors. Then there are three dimensions that could be used to represent the temporal evolution of your function. All you have to do is to create a 3D array where the third dimension represents time and all 2D snapshots will be stored in the first two dimensions.

When it comes to visual representation of the results you could either use some kind of waterfall plots where the z-axis will represent time or utilize the fourth dimension we can perceive, time that is, to create an animation of the evolution of the wave.

I am not very familiar with Python, so I will only provide a generic naive implementation. I am sure a lot of people here could provide some simplification and/or optimisation of the following snippet. I assume that everything in your first two blocks of code is available so changes have to be done only in the last block you present

I've figured it out, here are the relevant bits of code:

Your second example seems fine on my end, but here is a simpler alternative:

1. Use the Reds cmap with vmin=0.5 (no need to alter the cbar's ylim and yticklabels)
2. Use the mask param to automatically mask thresholded values (no need to zero them out)
3. Set the "bad" and "under" colors for displaying masked values on the heatmap and colorbar

The following led me to a wild chase through various ffmpeg options, but all this is as far as I could tell never really documented, so I hope it's going to be useful to others who are as puzzled as I am by these fairly cryptic behaviors.

The difference is caused by the default parameters for libswscale, the ffmpeg component responsible for converting from YUV to RGB; in particular, adding the full_chroma_int+bitexact+accurate_rnd flags eliminates the difference between the frames:

I don't know why u created all these methods individually, but I found that your self variables have the exact same name as your functions does, so change your self variables name(also remember to change the variables name where u have returned each of them and remove the dashes from the beginning), remove the '()' from the result list, also remove the 'float()' and 'int()' from the final return from the class and replace them with 'str()'

Well, the short answer is yes.

Though my recommendation, as a developer who's worked with numeraous frameworks and languages, would be Vue instead of React as it is much more beginner friendly paired with php written backend, not only because of its pretty easy to get into, but it can also be deployed on practivally any type of server or webhost.

I once made a file-system db with 30 lines of code storing .json files. though in your case sql would be much more suitable, but would require a bit more than that.

I have the solution.

It is because I this codes in the shell :

Instead of providing a colormap, you can provide a list of colors. That list can be calculated from the given colormap, and the middle colors can be set explicitly to white.

Here is an example:

You define s here: