diff --git a/工具v2/生成直方图代码.py b/工具v2/生成直方图代码.py
index e858e646..c3bbe062 100644
--- a/工具v2/生成直方图代码.py
+++ b/工具v2/生成直方图代码.py
@@ -20,6 +20,19 @@ class MyWindow(QWidget,Ui_Form):
         for x in self.xlist:
             output += f"({x},)[]\n"
         self.plainTextEdit_yinfo.setPlainText(output)
+    def folding(self):
+        if self.xmin <= self.xwidth:
+            foldingstr = ""
+        else:
+            midpoint = 1/2 * (self.xstart + self.xmin)
+            dist = (midpoint - self.xstart) / 6
+            foldingstr = ""
+            height = 0.2/self.yscale
+            foldingstr += f" -- ({(self.xstart+dist*4):.2f},0)"
+            foldingstr += f" -- ({(self.xstart+dist*5):.2f},{height:.4f})"
+            foldingstr += f" -- ({(self.xstart+dist*7):.2f},{-height:.4f})"
+            foldingstr += f" -- ({(self.xstart+dist*8):.2f},0)"
+        return foldingstr
     def exec(self):
         xlabel = self.lineEdit_xlabel.text()
         coordinateinfo = self.plainTextEdit_yinfo.toPlainText()
@@ -29,8 +42,8 @@ class MyWindow(QWidget,Ui_Form):
             self.xstart = self.xmin - self.xwidth
         self.xmax = self.xlist[-1] + self.xwidth
         self.xend = self.xmax + self.xwidth #计算x轴的终点坐标
-        xscale = 5/(self.xend-self.xstart) #计算x放缩比例
-        # print(xscale)
+        self.xscale = 5/(self.xend-self.xstart) #计算x放缩比例
+        # print(self.xscale)
         self.coordinatelist = re.findall(r"\(([\d\.]+),([\d\.]+)\)\[([\S]*)\]",coordinateinfo) #计算坐标信息
         for cindex in range(len(self.coordinatelist)):
             x,y,label = self.coordinatelist[cindex]
@@ -59,13 +72,13 @@ class MyWindow(QWidget,Ui_Form):
         self.dashedstr = ",".join(self.dashedstr_raw)
         # print(self.dasheddict) 
         ymax = max([float(i) for i in self.dasheddict.keys()])
-        yscale = 3/ymax #3是y的长度, 计算y放缩比例
-        self.yend = ymax + 1/float(yscale)
+        self.yscale = 3/ymax #3是y的长度, 计算y放缩比例
+        self.yend = ymax + 1/float(self.yscale)
         latexcode = f"""\\begin{{center}}
-        \\begin{{tikzpicture}}[>=latex, xscale = {xscale:.2f}, yscale = {yscale:.2f}]
-        \\draw [->] ({self.xstart},0) -- ({self.xend},0) node [below right] {{{xlabel}}};
+        \\begin{{tikzpicture}}[>=latex, xscale = {self.xscale:.4f}, yscale = {self.yscale:.4f}]
+        \\draw [->] ({self.xstart},0) {self.folding()}-- ({self.xend},0) node [below right] {{{xlabel}}};
         \\draw [->] ({self.xstart},0) -- ({self.xstart},{self.yend:.2f}) node [left] {{$\\dfrac{{\\text{{频率}}}}{{\\text{{组距}}}}$}};
-        \\draw ({self.xstart},0) node [below] {{${self.xstart}$}};
+        \\draw ({self.xstart},0) node [below] {{$0$}};
         \\foreach \\i/\\j in {{{self.coordinatestr}}}
         {{\\draw (\\i,0) node [below] {{$\\i$}} --++ (0,\\j) --++ ({self.xwidth},0) --++ (0,-\\j);}};
         \\draw ({self.xmax},0) node [below] {{${self.xmax}$}};