I have to show a graph with some points, i want that the points appear when it was generated, not all at end. I want to show the result point by point. I was looking for but i didnt find anything. is it possible?
Thank you!
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I'm ultra-green on scriptwriting and would love some of your help!
I want to create a simple indicator that is displayed over the bars, having a short horizontal line showing the high/low of a specified timeframe.
Anyone could help me with this script, please?
Much appreciated!
Thanks
I have 19451 points exported by coordinates in a JSON file. I am trying to render them in an efficient way on the map with circles. How can I achieve this? It is the first time I am using https://github.com/react-native-maps/react-native-maps with expo, so I am not that experienced in using maps services. I don't even know where to start from. I was thinking of something like rendering the points dynamically, based on whether one point is to be found in the region of the map that is currently shown on the screen, although I have no idea how to actually achieve this. The first thing I tried was to obviously render them at once: it takes ages and it is very buggy!
You have several options:
Use some kind of clustering when there are multiple circles in the same area, for example when you're zoomed out. Have a look at react-native-maps-clustering. Performance wise is decent enough but it may lag on older devices.
When you go over a zoom level you can limit the number of circles you draw, I guess they overlap anyways. When your limit has been reached, you can display some warning to let the user know that the number of circles was limited and he should zoom in. From my experience, drawing max 50 custom markers was the upper limit to avoid lag on older devices. With circles, that limit might be different.
Manually filter your data and decide whether the circle belongs to the current viewport (visible part of the map) or not.
Some code would help me to give you some more hints.
White, red, and green lines are some levels, according to a criterion, and blue line is measured spectrum, in upper picture.
Now, I want to attach the names of the lines, corresponding to levels, on the right end of lines.
The below picture is what I expect.
I couldn't find any plot property for these work.
Could anyone help me?
Thanks in advance.
You can use the Annotation List property to set annotations at specific points in the graph and I believe also link them to plots.
I have no practical experience with it, so I'm not familiar with all it can do. It might also give you the ability to manipulate specific annotations, etc. Play with it and see.
Here is the solution for the problem: https://lavag.org/topic/17756-xy-graph-programmatically-add-point-labels/
It uses Annotation List property as Yair told already.
I've been given a task to make image resizing using approximation. The problem is that i have no idea how may it works. The previous task was to do this using interpolation, and everything was clear about that. Now i need to use approximation. So for example if i have 512x512 picture, and let's say i take every other pixels. With this i get twice smaller picture. So now i would like to use that picture (256x256) to get back to my original one. But I have no idea how to retrieve that data using approximation. Any help will be appreciated :)
Can anyone please point me in the correct direction or tell me if what I am trying to do is simply not possible?
I'm trying to take a picture of something close up. I am able to lock the focus. That works well. We have found that keeping the torch on while trying to focus and take the picture works best. The issue I cannot seem to resolve is the white balance. If the background is dark, the object I'm trying to focus on is too light. Is there a trick to adjusting the white balance when the item in focus is close up and the background (out of focus) is dark?
I can't provide the code, it's too much. I suppose if necessary I could create a sample project, but my question is probably more conceptual.
Thank you in advance for any help you can provide.
The answer to this question, for those who run across the same issue, is to use a CALayer for an exposeBox and another CALayer for a focusBox. That appeared to do the trick. Of course, I would still like to hear of solutions from others and I'm still curious about controlling the aperture.
Thank you.