Tag: graph


December 18th, 2008 — 1:50pm

Yesterday I continued working on the heart-beat graph. I’ve managed to animate it. The speed of the animations varies with your cursor position. The speed ranges from 1000 milliseconds to 1 millisecond. When the animation goes faster the string of dots seems to be alive, like some snake like creature. Fascinating to watch.

The dots are 15 pixels apart. For my test file with 20 hours of data the heart-beat graph has a width of 107374 pixels! Flash is pretty powerful to caculate this image in less than a second, amazing.

As for the data collection. I’ve slept a night with the belt fastened by broad strips of medical tape. It worked till 7 am, which is an improvement but still not perfect. I’ve posted the question at a user group and hope to get some tips for improving this.

ps. My lowest heart-rate was 34 bpm this night! The lowest I ever measured.

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December 16th, 2008 — 7:08pm

prototype of the first heart-beat graph

prototype of the first heart-beat graph

I’ve managed to code my first heart-rate graphic. And it’s CUTE!
By looping through the big data file I can isolate the heart-beats, take the different values to draw lines and put in the dots at the right coordinates. The next step is to draw a big graph in Flash and move it to the right at certain intervals (500 milliseconds for example). Now it still is a drawing that is animated from left to right. It disappears from view after a while, as you can see in the picture.

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