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I've looked at a variety of iPhone graphs, and while a lot of them work for line graphs, I have not been able to find anything that does graph annotations like the image below. Are there any graphs for iOS that support graph annotations?
There are many comparison article of the different iOS Graphing Libraries. See these comparisons for an in depth analysis of their differing features:
http://www.scottlogic.com/blog/2012/05/21/comparison-of-the-available-ios-charting-libraries.html
https://blog.serverdensity.com/how-to-build-stunning-custom-ios-graphs-on-iphone-and-ipad/
Not many of them support built in annotations. You may have to add that yourself. Core-Plot sounds like your best option: https://code.google.com/p/core-plot/
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I'm searching a library which help me to plot 3D graphs. I would like something similar to this page or GNUPlot. I would make all the calculations, I only want a library that can print my (x, y, z) values to the iPhone/iPad screen.
Searching on google, I found core-plot, but as far as I know it can only print 2D graphs.
Thanks!
ManiacDev recently posted a good overview of good frameworks for plotting 3D charts on iOS:
http://maniacdev.com/2012/08/open-source-ios-library-for-easily-creating-3d-charts/
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I am looking for a simple (preferably open source) handwriting recognition library for the iPhone/iPad. In my case, I'm only interested in recognizing numbers.
Does anyone know of a good library for this?
You would have to make some efforts to compile but Tesseract is good solution.
For compiling it look http://iphone.olipion.com/cross-compilation/tesseract-ocr. For sample application see http://robertcarlsen.net/tag/tesseract
There are many libraries available for extracting text from images. You can check my answer
For restricting OCR to provide numbers only Tesseract SDK provides method as blacklist and whitelist characters
_tesseract->SetVariable("tessedit_char_whitelist", "0123456789");
Using this method you can restrict only numbers to be recognized.
Hope it helps.
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I'm looking for good library for iphone to draw charts (pie chart, bar chart). I've tested Core plot, which was recommended by many people, but I think the generated charts look poor.
I saw example of good-looking charts in that application:
Anyone knows what library was used there? Or what library can help me achieve similar, nice look?
I would use CorePlot, but since you dont like it…
In one project I used the Google Chart api. Nearly everything is customizable, the only downside is that you have to be connected the internet to fetch the image. Depending on your use case, it might be appealing.
You can also checkout the huge list of responses to this similar question: Is there a good charting library for iPhone?
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Closed 9 years ago.
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I am looking for a simple (preferably open source) handwriting recognition library for the iPhone/iPad. In my case, I'm only interested in recognizing numbers.
Does anyone know of a good library for this?
You would have to make some efforts to compile but Tesseract is good solution.
For compiling it look http://iphone.olipion.com/cross-compilation/tesseract-ocr. For sample application see http://robertcarlsen.net/tag/tesseract
There are many libraries available for extracting text from images. You can check my answer
For restricting OCR to provide numbers only Tesseract SDK provides method as blacklist and whitelist characters
_tesseract->SetVariable("tessedit_char_whitelist", "0123456789");
Using this method you can restrict only numbers to be recognized.
Hope it helps.
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Closed 9 years ago.
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One of my projects needs to show users where they rank in certain calculations. I inherited the graph structure from the previous programmer and had to leave it alone while I worked on other parts of the site.
It's time to make the graphs more meaningful, so I'm looking for books/websites/etc about graphs. (Not graph theory!) Charts that convey comparisons at a glance.
Everyone suggests The Visual Display of Quantitative Information by Edward Tufte and that's spot on for what I'm looking for, so anything related to that would be great.
Naturally, personal experience about what to do or not would be helpful as well.
I found Stephen Few's book "Show Me the Numbers" very helpful.