173 lines
3.8 KiB
JavaScript
173 lines
3.8 KiB
JavaScript
const app = getApp();
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const math = require('../../utils/math.js');
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Page({
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data: {
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age: '',
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height: '',
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gender: 'male',
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showResult: false,
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sdsValue: null,
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percentile: null,
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growthEvaluation: '',
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chartData: null
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},
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// 输入年龄
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inputAge(e) {
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this.setData({
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age: Number(e.detail.value) // 确保age是数字
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});
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},
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// 输入身高
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inputHeight(e) {
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this.setData({
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height: Number(e.detail.value) // 确保height是数字
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});
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},
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// 选择性别
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selectGender(e) {
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const gender = e.currentTarget.dataset.gender;
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this.setData({ gender });
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},
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// 重置表单
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reset() {
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this.setData({
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age: '',
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height: '',
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gender: 'male',
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showResult: false
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});
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},
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// 计算SDS
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calculate() {
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const { age, height, gender } = this.data;
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// 输入验证
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if (!age || !height) {
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wx.showToast({
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title: '请填写完整信息',
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icon: 'none'
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});
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return;
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}
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// 直接使用本地生长数据
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this.useLocalGrowthData();
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},
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// 处理生长数据
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processGrowthData(growthData) {
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try {
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const { age, height, gender } = this.data;
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// 计算SDS值并获取标准数据
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const { sds, standard } = this.calculateSDS(height, age, gender, growthData);
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console.log('SDS计算详情：', {
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height,
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age,
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gender,
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mean: standard.mean,
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sd: standard.sd,
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sds
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});
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// 显示计算公式
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console.log(`计算公式：SDS = (${height} - ${standard.mean}) / ${standard.sd} = ${sds.toFixed(2)}`);
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// 计算百分位数
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const percentile = this.calculatePercentile(sds);
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// 获取生长评价
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const evaluation = this.getGrowthEvaluation(sds);
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// 更新结果
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this.setData({
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showResult: true,
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sdsValue: Number(sds.toFixed(2)), // 确保sdsValue是数字类型
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percentile: percentile,
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growthEvaluation: evaluation
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});
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// 绘制生长曲线
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this.drawGrowthChart(growthData);
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} catch (error) {
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wx.showToast({
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title: error.message || '计算失败',
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icon: 'none'
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});
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}
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},
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// 使用本地生长数据
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useLocalGrowthData() {
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try {
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const localData = require('./growthData.js');
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// 确保数据类型一致
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const processedData = localData.map(item => ({
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...item,
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age: Number(item.age)
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}));
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this.processGrowthData(processedData);
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} catch (error) {
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wx.showToast({
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title: '本地数据加载失败',
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icon: 'none'
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});
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}
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},
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// 计算SDS值
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calculateSDS(height, age, gender, growthData) {
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// 根据年龄和性别获取标准值
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const standard = growthData.find(d =>
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Number(d.age) === Number(age) &&
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d.gender === gender
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);
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if (!standard) {
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throw new Error('未找到对应年龄和性别的标准数据');
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}
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// SDS = (实际值 - 平均值) / 标准差
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const sds = (height - standard.mean) / standard.sd;
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return { sds, standard };
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},
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// 计算百分位数
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calculatePercentile(sds) {
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// 使用标准正态分布计算百分位数
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const percentile = 100 * (1 + math.erf(sds / Math.sqrt(2))) / 2;
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return percentile.toFixed(1);
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},
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// 获取生长评价
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getGrowthEvaluation(sds) {
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if (sds < -2) {
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return '生长迟缓';
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} else if (sds >= -2 && sds <= 2) {
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return '正常范围';
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} else {
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return '生长过快';
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}
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},
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// 绘制生长曲线
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drawGrowthChart(growthData) {
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const ctx = wx.createCanvasContext('growthChart');
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// 绘制逻辑...
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ctx.draw();
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},
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// 返回
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onClickLeft() {
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wx.navigateBack();
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}
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});
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