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marcusjzw xiaoxiaozhangx fenox dzungpv jafei ashterry

hrv-lib's Issues

Code license?

Hello,
Can you guy add the license type of this library?

NumberIsTooSmallException Exception

User Reports this Exception, but no message

org.apache.commons.math3.exception.NumberIsTooSmallException: number of points (0)
	at org.apache.commons.math3.analysis.interpolation.SplineInterpolator.interpolate(SplineInterpolator.java:74)
	at hrv.calc.manipulator.HRVSplineInterpolator.manipulate(HRVSplineInterpolator.java:24)
	at hrv.calc.manipulator.HRVMultiDataManipulator.manipulate(HRVMultiDataManipulator.java:17)
	at hrv.band.app.control.HRVCalculatorFacade.getPowerSpectrum(HRVCalculatorFacade.java:127)
	at hrv.band.app.control.HRVCalculatorFacade.getLF(HRVCalculatorFacade.java:62)
	at hrv.band.app.control.Measurement.from(Measurement.java:200)
	at hrv.band.app.view.fragment.MeasuringFragment$ProgressBarAnimatorListener.createMeasurement(MeasuringFragment.java:424)
	at hrv.band.app.view.fragment.MeasuringFragment$ProgressBarAnimatorListener.onAnimationEnd(MeasuringFragment.java:397)
	at android.animation.ValueAnimator.endAnimation(ValueAnimator.java:1149)
	at android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1309)
	at android.animation.AnimationHandler.doAnimationFrame(AnimationHandler.java:146)
	at android.animation.AnimationHandler.-wrap2(AnimationHandler.java)
	at android.animation.AnimationHandler$1.doFrame(AnimationHandler.java:54)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:925)
	at android.view.Choreographer.doCallbacks(Choreographer.java:702)
	at android.view.Choreographer.doFrame(Choreographer.java:635)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:913)
	at android.os.Handler.handleCallback(Handler.java:751)
	at android.os.Handler.dispatchMessage(Handler.java:95)
	at android.os.Looper.loop(Looper.java:154)
	at android.app.ActivityThread.main(ActivityThread.java:6688)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)

Define a procedure for requirement analysis and requirement review

Procedure:
First: Finde Requirements with any technique you want
Second: Write short User Stories
Third: If the User Story is considered as important write a Use Case and or Use Case Diagram

Review: (Some points)
Check whether use cases are written in active language
Have a use case check list.

NegativeArraySizeException in SDSDCalculator

NegativeArraySizeException in SDSDCalculator reported by a user. This should be fixed before next version.
User Message: App crashes every time I want to start a measurement

Stacktrace:

java.lang.NegativeArraySizeException: -1
	at hrv.calc.parameter.SDSDCalculator.process(SDSDCalculator.java:12)
	at hrv.calc.parameter.SD2Calculator.process(SD2Calculator.java:12)
	at hrv.band.app.control.HRVCalculatorFacade.getSD2(HRVCalculatorFacade.java:92)
	at hrv.band.app.control.Measurement.from(Measurement.java:199)
	at hrv.band.app.view.fragment.MeasuringFragment$ProgressBarAnimatorListener.createMeasurement(MeasuringFragment.java:433)
	at hrv.band.app.view.fragment.MeasuringFragment$ProgressBarAnimatorListener.onAnimationEnd(MeasuringFragment.java:399)
	at android.animation.ValueAnimator.endAnimation(ValueAnimator.java:1149)
	at android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1309)
	at android.animation.AnimationHandler.doAnimationFrame(AnimationHandler.java:146)
	at android.animation.AnimationHandler.-wrap2(AnimationHandler.java)
	at android.animation.AnimationHandler$1.doFrame(AnimationHandler.java:54)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:925)
	at android.view.Choreographer.doCallbacks(Choreographer.java:702)
	at android.view.Choreographer.doFrame(Choreographer.java:635)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:913)
	at android.os.Handler.handleCallback(Handler.java:751)
	at android.os.Handler.dispatchMessage(Handler.java:95)
	at android.os.Looper.loop(Looper.java:154)
	at android.app.ActivityThread.main(ActivityThread.java:6688)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)

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