在外汇EA编程中,数组是一种非常重要的数据结构,用于存储和管理多个相关数据。以下是一些常用的数组函数及其用法:
数组初始化
```
ArrayInitialize(array[], int size)
```
用于初始化一个数组,指定其大小。例如:
```
double prices;
ArrayInitialize(prices, 50);
```
数组获取为系列
```
ArrayGetAsSeries(array[], int series_index)
```
将数组转换为系列(Series)。例如:
```
double prices;
ArrayInitialize(prices, 50);
Series* series = ArrayGetAsSeries(prices, 0);
```
数组复制
ArrayCopy
```
ArrayCopy(dest_array[], src_array[], int size)
```
将一个数组的内容复制到另一个数组。例如:
```
double src_prices = {1.1, 1.2, 1.3, ..., 1.50};
double dest_prices;
ArrayCopy(dest_prices, src_prices, 50);
```
ArrayCopyRates
```
ArrayCopyRates(dest_array[], symbol, timeframe)
```
将指定货币对和时间周期的价格数据复制到二维数组中。例如:
```
double dest_rates;
ArrayCopyRates(dest_rates, "EURUSD", PERIOD_H1);
```
ArrayCopySeries
```
ArrayCopySeries(dest_array[], series_index, symbol, timeframe)
```
将指定系列的走势图数据复制到数组中。例如:
```
double dest_series;
ArrayCopySeries(dest_series, 0, "EURUSD", PERIOD_H1);
```
数组操作
ArrayBsearch
```
int ArrayBsearch(double array[], double value, int count, int start, int direction)
```
在数组中搜索指定值,返回其索引。例如:
```
double prices = {1.1, 1.2, 1.3, ..., 1.50};
int index = ArrayBsearch(prices, 1.3, 50, 0, 0);
```
ArrayMaximum
```
double ArrayMaximum(double array[], int size)
```
返回数组中的最大值。例如:
```
double prices = {1.1, 1.2, 1.3, ..., 1.50};
double max_price = ArrayMaximum(prices, 50);
```
ArrayMinimum
```
double ArrayMinimum(double array[], int size)
```
返回数组中的最小值。例如:
```
double prices = {1.1, 1.2, 1.3, ..., 1.50};
double min_price = ArrayMinimum(prices, 50);
```
ArrayRange
```
double ArrayRange(double array[], int size)
```
返回数组中的最大值与最小值之差。例如:
```
double prices = {1.1, 1.2, 1.3, ..., 1.50};
double price_range = ArrayRange(prices, 50);
```
ArrayResize
```
void ArrayResize(double array[], int new_size)
```
调整数组的大小。例如:
```
double prices;
ArrayInitialize(prices, 50);
ArrayResize(prices, 100);
```
ArraySort
```
void ArraySort(double array[], int size)
```
对数组进行排序。例如:
```
double prices = {1.1, 1.2, 1.3, ..., 1.50};
ArraySort(prices, 50);
```
数组维度