本文整理汇总了TypeScript中eez-studio-shared/extensions/extension.IMeasureTask类的典型用法代码示例。如果您正苦于以下问题：TypeScript IMeasureTask类的具体用法？TypeScript IMeasureTask怎么用？TypeScript IMeasureTask使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了IMeasureTask类的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1: function
export default function(task: IMeasureTask) {
let numSamples = Math.min(
Math.pow(2, Math.floor(Math.log(task.xNumSamples) / Math.log(2))),
1024 * 1024
);
var real = new Float64Array(numSamples);
var imag = new Float64Array(numSamples).fill(0);
for (let i = 0; i < numSamples; ++i) {
real[i] = task.getSampleValueAtIndex(
task.xStartIndex + Math.floor((i * task.xNumSamples) / numSamples)
);
}
transform(real, imag);
// Ignore 0 frequency part when trying to get frequency. Offset can be bigger than wave amplitude and cause issues.
var maxMag = real[1] * real[1] + imag[1] * imag[1];
var indexMax = 1;
for (var i = 2; i < real.length / 2; i++) {
var magnitude = real[i] * real[i] + imag[i] * imag[i];
if (magnitude > maxMag) {
maxMag = magnitude;
indexMax = i;
}
}
var step = task.samplingRate / task.xNumSamples;
var frequency = indexMax * step;
task.result = frequency;
task.resultUnit = "frequency";
}示例2: function
export default function(task: IMeasureTask) {
let result = Number.MAX_VALUE;
const xEndIndex = task.xStartIndex + task.xNumSamples;
for (let i = task.xStartIndex; i < xEndIndex; ++i) {
const y = task.getSampleValueAtIndex(i);
if (y < result) {
result = y;
}
}
task.result = result;
}示例3: function
export default function(task: IMeasureTask) {
let sum = 0;
const xEndIndex = task.xStartIndex + task.xNumSamples;
for (let i = task.xStartIndex; i < xEndIndex; ++i) {
const sample = task.getSampleValueAtIndex(i);
if (!isNaN(sample)) {
sum += sample;
}
}
task.result = sum / task.xNumSamples;
}示例4: function
export default function(task: IMeasureTask) {
let min = Number.MAX_VALUE;
let max = Number.MIN_VALUE;
const xEndIndex = task.xStartIndex + task.xNumSamples;
for (let i = task.xStartIndex; i < xEndIndex; ++i) {
const y = task.getSampleValueAtIndex(i);
if (y < min) {
min = y;
}
if (y > max) {
max = y;
}
}
task.result = max - min;
}示例5: function
export default function(task: IMeasureTask) {
//
let numSamples = Math.pow(2, Math.floor(Math.log2(task.xNumSamples)));
let F = task.xNumSamples / numSamples;
let halfNumSamples = Math.floor(numSamples / 2);
//
const real = new Float64Array(numSamples);
real[0] = task.getSampleValueAtIndex(task.xStartIndex + 0);
for (let i = 1; i < numSamples; ++i) {
real[i] = task.getSampleValueAtIndex(task.xStartIndex + Math.round(i * F));
}
const imag = new Float64Array(numSamples).fill(0);
//
transform(real, imag);
//
const yAxisInDecibels =
!task.parameters || !task.parameters.yAxis || task.parameters.yAxis !== "linear";
function toDecibels(i: number) {
const re = real[i];
const im = imag[i];
const pow_dB = 10 * Math.log10((re * re + im * im) / (numSamples * numSamples));
return Math.max(pow_dB, -110);
}
function getLinearYValue(i: number) {
const re = real[i];
const im = imag[i];
return Math.sqrt(re * re + im * im) / numSamples;
}
const getYValue = yAxisInDecibels ? toDecibels : getLinearYValue;
const data = new Array(halfNumSamples);
let minValue, maxValue;
minValue = maxValue = data[0] = getYValue(0);
for (let i = 1; i < halfNumSamples; ++i) {
data[i] = getYValue(i);
if (data[i] < minValue) {
minValue = data[i];
} else if (data[i] > maxValue) {
maxValue = data[i];
}
}
//
task.result = {
data,
samplingRate: numSamples / (task.samplingRate / F),
xAxes: {
unit: "frequency",
logarithmic:
!task.parameters || !task.parameters.xAxis || task.parameters.xAxis !== "linear"
},
yAxes: {
unit: yAxisInDecibels ? "decibel" : task.valueUnit,
minValue,
maxValue
}
};
}