Added round for data length computing

Author: demvlad

src/graph_spectrum_calc.js

@@ -113,7 +113,7 @@ GraphSpectrumCalc._dataLoadFrequencyVsX = function(vsFieldNames, minValue = Infi
 
   // We divide it into FREQ_VS_THR_CHUNK_TIME_MS FFT chunks, we calculate the average throttle
   // for each chunk. We use a moving window to get more chunks available.
-  const fftChunkLength = this._blackBoxRate * FREQ_VS_THR_CHUNK_TIME_MS / 1000;
+  const fftChunkLength = Math.round(this._blackBoxRate * FREQ_VS_THR_CHUNK_TIME_MS / 1000);
   const fftChunkWindow = Math.round(fftChunkLength / FREQ_VS_THR_WINDOW_DIVISOR);
 
   let maxNoise = 0; // Stores the maximum amplitude of the fft over all chunks
@@ -156,9 +156,9 @@ GraphSpectrumCalc._dataLoadFrequencyVsX = function(vsFieldNames, minValue = Infi
       }
       // Translate the average vs value to a bin index
       const avgVsValue = sumVsValues / fftChunkLength;
-      let vsBinIndex = Math.floor(NUM_VS_BINS * (avgVsValue - flightSamples.minValue) / (flightSamples.maxValue - flightSamples.minValue));
+      let vsBinIndex = Math.round(NUM_VS_BINS * (avgVsValue - flightSamples.minValue) / (flightSamples.maxValue - flightSamples.minValue));
       // ensure that avgVsValue == flightSamples.maxValue does not result in an out of bounds access
-      if (vsBinIndex === NUM_VS_BINS) { vsBinIndex = NUM_VS_BINS - 1; }
+      if (vsBinIndex >= NUM_VS_BINS) { vsBinIndex = NUM_VS_BINS - 1; }
       numberSamples[vsBinIndex]++;
 
       // add the output from the fft to the row given by the vs value bin index
@@ -349,7 +349,7 @@ GraphSpectrumCalc._getFlightSamplesFreqVsX = function(vsFieldNames, minValue = I
   }
 
   // Calculate min max average of the VS values in the chunk what will used by spectrum data definition
-  const fftChunkLength = this._blackBoxRate * FREQ_VS_THR_CHUNK_TIME_MS / 1000;
+  const fftChunkLength = Math.round(this._blackBoxRate * FREQ_VS_THR_CHUNK_TIME_MS / 1000);
   const fftChunkWindow = Math.round(fftChunkLength / FREQ_VS_THR_WINDOW_DIVISOR);
   for (let fftChunkIndex = 0; fftChunkIndex + fftChunkLength < samplesCount; fftChunkIndex += fftChunkWindow) {
     for (const vsValueArray of vsValues) {