腾讯股票接口API（4）:计算分时线平均值
以茅台为例，通过上一篇《腾讯股票接口API（3）——根据股票代码获取分时数据》中获取到了股票的分时数据：{"code":0,"msg":"","data":{"sh600519":{"data":{"data":["0930 2000.00 925","0931 1981.01 1321","0932 1984.88 1754","0933 1980.03 2033","0934 1988.98 2243","0935 1979.03 2694","0936 1981.01 3102","0937 1984.50 3430","0938 1982.97 3542","0939 1987.69 3709","0940 1991.88 3959","0941 1994.94 4240","0942 2000.01 4499","0943 2003.02 4781","0944 2002.06 5038","0945 1999.98 5260","0946 1999.01 5390","0947 1999.00 5469","0948 1999.86 5683","0949 2000.00 5987","0950 2008.00 6186","0951 2014.99 6487","0952 2013.90 6643","0953 2014.00 6830","0954 2012.00 6985","0955 2014.81 7153","0956 2018.99 7374","0957 2022.00 7666","0958 2024.25 8011","0959 2032.00 8418","1000 2035.00 8841","1001 2032.99 9305","1002 2030.15 9562","1003 2033.24 9751","1004 2031.90 9931","1005 2028.80 10140","1006 2024.00 10311","1007 2026.55 10568","1008 2028.80 10794","1009 2023.10 10921","1010 2029.99 11129","1011 2028.53 11326","1012 2028.05 11496","1013 2028.01 11694","1014 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数据很多，我们把每分钟的节点单独拿出来分析
[
"0930 2000.00 925",// 这里每个字段指的是上午9：30，价格为2000.00，累计成交量为925
"0931 1981.01 1321"// 这里每个字段指的是上午9：31……
]
这里只返回了时间、当前价格和当前累计成交量，如果要画分时图的均值线，需要自己计算。找了很多文档没有明确说明如何计算，大多数是介绍各种指标，本来不是股民，对这些东西很陌生，有些不太懂，我算了一下午找到了规则，记录一下。
首先在电脑网页上查看了贵州茅台的数据，列了出来，加星号的为返回来的字段，按照猜想计算：
贵州茅台600519.SH
序号 时间* 价格* 均价 累计成交量* 当前成交量
1 9:30 2000 2000 925 925
2 9:31 1981.01 1994.31 1321 396
3 9:32 1984.88 1991.98 1754 433
4 9:33 1980.03 1990.34 2033 279
5 9:34 1988.98 1990.21 2243 210
6 9:35 1979.03 1988.34 2694 451
1. 当前成交量
最好验证的是当前成交量（最后一列）
当前成交量 = 累计成交量 - 上一时间点累计成交量
9:30刚开盘，是第一次成交，当前成交量就是累计成交量，即表中的925
9:31过了1分钟后，成交量 = 1321-925=369
以此类推……
2. 平均价
开盘第一个节点的平均值=当前价格
其实第一个节点平均值 = 当前成交价×当前成交量÷当前成交量
即：2000×925÷925 = 2000。
平均价=当前总成交额 （累计成交额）÷总成交量
总成交额 = 当前成交价×当前成交量+之前累计成交额
以9:31节点为例：
average = ÷ 1321 = 1944.307312 ≈ 1944.31
取两位小数四舍五入为1944.31，结果正是表格中看到的数值，计算公式得到验证，之后的以此类推。
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