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Using the Numbers effect to translate Heart Rate data into a readout??
Hi guys I was recommended to come over to the expressions side of the AE forums as the problem I have may be able to be fixed by an expression.
I am doing a project where I’m making use of a heart rate monitor. I am able to extract the heart rate data (which is recorded once every second such as: 99, 101, 100, 100, 100, 101, 102, 102, 107, 113 etc). The data was recorded for around 31 minutes, which gave me 1910 of those numbers.
I am wanting to use this data to make a number readout in After Effects, but I’m not sure how to add or use the data I have in order to make it accurately follow the data.
So it has to read from the list of 1910 numbers, and display each number for 1 second each.
Any ideas if this is possible guys?
Thanks!
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11 Replies
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What does the data look like?
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It is literally just a list of numbers with commas separating them like such:
171,171,171,171,170,170,170,170,170,170,170,170,170,170,170,170,170,171,171,171,171,171,171,171,171,170,170,170,170,159,159,159,159,159,159,159,159,148,148,148,148,148,148,148,0,0,175,174,173,173,173,173,173,174,174,174,174,174,174,174,174,174,174,174,174,174,174,174,175,175,175,175,175,176,176,176,176,176,176,177,177,177,177,177,177,177,177,177,178,178,177,177,177,177,176,176,175,174,172,171,170,170,170,170,170,171,171,171,172,172,172,172,172,172,172,172,173,173,173,173,173, etc.
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If you can edit your text file so that the line starts like this:
myArray = [171,171,171,171,170,170,
and ends like this:
172,173,173,173,173,173];
Then an expression like this should work:
myPath = “c:/test/test.txt”;
$.evalFile(myPath);
idx = Math.min(Math.max(Math.floor(time – inPoint),0),myArray.length-1);
myArray[idx]You’ll need to edit myPath to point to your text file.
Dan
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Thanks Dan I am just about to try this out. Do I apply this expression to the numbers effect ‘value’ setting?
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That should work. I tested it by applying it to the Source Text property of a text layer.
Dan
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It worked! Thank you so much :). Sooo glad I don’t have to do it all manually lol.
Thanks again Dan, you’re awesome!
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Sorry to bother you with another question Dan, but is there a way to make the numbers change color once they get to a certain number threshold?
Like this
90 – 120 = green
121 – 150 = orange
151 – 180 = red -
With the numbers effect? Something like this for Fill Color should work:
val = effect(“Numbers”)(“Value/Offset/Random Max”);
if (val < 121)
[0,1,0,1]
else if (val < 151)
[1,.5,0,1]
else
[1,0,0,1]Dan
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That does work great! Is there a way to link it to ‘hue/saturation’ effect so that the color gradually changes from green to yellow to orange to red as the number gets higher, and then more towards green as it gets lower?
(PS: sorry for my stupidity, these expressions baffle me!)
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The hue effect doesn’t take expressions, but you should be able to simulate it if you set the Fill color to red and replace the previous expression with this one:
val = effect(“Numbers”)(“Value/Offset/Random Max”);
hsl1 = rgbToHsl([0,1,0,1]);
hsl2 = rgbToHsl([1,.5,0,1]);
hsl3 = rgbToHsl([1,0,0,1]);
if (val < 121)
h = linear (val,90,121,hsl1[0],hsl2[0])
else if (val < 151)
h = linear(val,121,151,hsl2[0],hsl3[0])
else
h = hsl3[0];
hslToRgb([h,hsl1[1],hsl1[2],1])Dan
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