//+------------------------------------------------------------------+ //+------------------------------------------------------------------+ //| expert initialization function | //+------------------------------------------------------------------+ int init() { //---- start(); //---- return(0); } //+------------------------------------------------------------------+ //| expert deinitialization function | //+------------------------------------------------------------------+ int deinit() { //---- //---- return(0); } void export() { string file="export_"+Symbol()+"_"+Period()+".csv"; int f=FileOpen(file,FILE_CSV|FILE_WRITE,","); if(f<1) { Alert("File opening error"); return(0); } for(int i=Bars-1;i<=0;i--) { FileWrite(f,TimeToStr(Time,TIME_DATE|TIME_MINUTES),Open,High,Low,Close ,iFractals(Symbol(),0,1,i),iFractals(Symbol(),0,2,i),iCustom(Symbol(), 0,"ZigZag",0,i),iCustom(Symbol(),0, "ZigZag",1,i)); } Alert("Export "+Symbol()+" finished. Exported: "+Bars+" records"); FileFlush(f); FileClose(f); } //+------------------------------------------------------------------+ //| expert start function | //+------------------------------------------------------------------+ int start() { export(); //---- //Alert(ArraySize(norepeats) + ArraySize(morerepeats)); return(0); } //+------------------------------------------------------------------+
请使用论坛搜索 . .
https://www.mql5.com/en/forum/147170
. . . .和文件
我以这种方式进行了组合,但它给我带来了错误。我不明白为什么我得到的文件没有任何数据
//#property copyright "" //#property link "" //+------------------------------------------------------------------+ //| script program start function | //+------------------------------------------------------------------+ int start() { export(); } //+------------------------------------------------------------------+ void export() { string file="export_"+Symbol()+"_"+Period()+".csv"; int f=FileOpen(file,FILE_CSV|FILE_READ,","); if(f<1) { Alert("File opening error"); return(0); } for(int i=Bars-1;i<=0;i--) { FileWrite(f,TimeToStr(Time,TIME_DATE|TIME_MINUTES),Open,High,Low,Close ,iFractals(Symbol(),0,1,i),iFractals(Symbol(),0,2,i),iCustom(Symbol(), 0,"ZigZag",0,i),iCustom(Symbol(),0, "ZigZag",1,i)); } Alert("Export "+Symbol()+" finished. Exported: "+Bars+" records"); FileFlush(f); FileClose(f); }
1) >=
for(int i=Bars-1;i<=0;i--)
2)FILE_WRITE或 FILE_READ|FILE_WRITE
FileOpen(file,FILE_CSV|FILE_READ,",");
3) 你知道EMPTY_VALUE 吗(ZZ和Fractals可能有这个功能)? (空值不会被画出来或显示在DataWindow中。默认情况下,空值是EMPTY_VALUE)
4)在文件关闭时,数据会自动刷新到磁盘,所以在调用 FileClose()函数之前不需要调用FileFlush()函数 。
我做了这些修改,文件只得到一个事实。
我想不出更多
//#property copyright "" //#property link "" //+------------------------------------------------------------------+ //| script program start function | //+------------------------------------------------------------------+ int start() { export(); } //+------------------------------------------------------------------+ void export() { string file="export_"+Symbol()+"_"+Period()+".csv"; int f=FileOpen(file,FILE_READ|FILE_WRITE,","); if(f<1) { Alert("File opening error"); return(0); } for(int i=Bars-1;i>=0;i--) { FileWrite(f,TimeToStr(Time,TIME_DATE|TIME_MINUTES),Open,High,Low,Close ,iFractals(Symbol(),0,1,i),iFractals(Symbol(),0,2,i),iCustom(Symbol(), 0,"ZigZag",0,i),iCustom(Symbol(),0, "ZigZag",1,i)); FileClose(f); } Alert("Export "+Symbol()+" finished. Exported: "+Bars+" records"); FileClose(f); }
我做了这些修改,文件只得到一个事实。
我想不出更多
如果你打开一个文件,写到它,关闭它,然后再次打开它,写一些更多的数据,新的数据将被写到哪里? 文件的什么地方?
在代码中,我认为我使用了正确的步骤。我认为你应该把所有的数据下载到一个文件中。Csv,但不明白我为什么要这样做。
我试着创建了一个专家,或多或少有些类似的代码,我写了一个文件,例如每月的数据
1970.01.01 00:00,,,,,0,0,0,2147483647
1970.01.01 00:00,,,,,0,0,0,2147483647
1970.01.01 00:00,,,,,0,0,0,2147483647
1970.01.01 00:00,,,,,0,0,0,2147483647
1970.01.01 00:00,,,,,0,1.1614,0,2147483647
1970.01.01 00:00,,,,,0,0,0,2147483647
1970.01.01 00:00,,,,,0,0,0,2147483647
1970.01.01 00:00,,,,,0,0,0,2147483647
1970.01.01 00:00,,,,,0,0,0,2147483647
1970.01.01 00:00,,,,,0,0,0,2147483647
1970.01.01 00:00,,,,,1.4104,0,0,2147483647
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,1.1688,0,0
1970.01.01 00:00,,,,,1.2495,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,1.1192,0,0
1970.01.01 00:00,,,,,1.2315,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,1.1069,1.1069,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,1.2894,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,1.3161,0,0,1.3161
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,1.2351,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,1.4535,0,1.4535,1.4535
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,1.3,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,1.3353,1.2596,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,1.0344,1.0344,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,1.1537,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,1.0608,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,1.1216,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,1.079,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,0,0,0,0
1970.01.01 00:00,,,,,1.2401,0,1.2401,1.2401
但是没有再下载1970年的数据。
我们使用的代码如下。
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+ //| expert initialization function | //+------------------------------------------------------------------+ int init() { //---- start(); //---- return(0); } //+------------------------------------------------------------------+ //| expert deinitialization function | //+------------------------------------------------------------------+ int deinit() { //---- //---- return(0); } void export() { string file="export_"+Symbol()+"_"+Period()+".csv"; int f=FileOpen(file,FILE_CSV|FILE_WRITE,","); if(f<1) { Alert("File opening error"); return(0); } for(int i=Bars-1;i>=0;i--) { FileWrite(f,TimeToStr(Time,TIME_DATE|TIME_MINUTES),Open,High,Low,Close ,iFractals(Symbol(),0,1,i),iFractals(Symbol(),0,2,i),iCustom(Symbol(), 0,"ZigZag",0,i),iCustom(Symbol(),0, "ZigZag",1,i)); } Alert("Export "+Symbol()+" finished. Exported: "+Bars+" records"); FileClose(f); } //+------------------------------------------------------------------+ //| expert start function | //+------------------------------------------------------------------+ int start() { export(); //---- //Alert(ArraySize(norepeats) + ArraySize(morerepeats)); return(0); } //+------------------------------------------------------------------+
在代码中,我认为我使用了正确的步骤。我认为你应该在一个文件中下载所有的数据。Csv,但我不明白为什么要这样做。