diff --git a/YMatrix.py b/YMatrix.py
new file mode 100644
index 0000000..a4405c1
--- /dev/null
+++ b/YMatrix.py
@@ -0,0 +1,26 @@
+__author__ = 'dmy'
+
+import numpy
+
+import scipy.sparse as sparse
+
+import scipy.sparse
+
+def FormYMatrix(lineBlock,transBlock,busNum):
+    r=lineBlock[:,3]
+    x=lineBlock[:,4]
+    gb=1/(r+1j*x)
+    y=sparse.coo_matrix((gb,(lineBlock[:,1]-1,lineBlock[:,2]-1)),shape=(busNum,busNum))
+    #加接地支路
+    b2=lineBlock[:,5]
+    y+=sparse.coo_matrix((1j*b2,(lineBlock[:,1]-1,lineBlock[:,1]-1)),shape=(busNum,busNum))
+    y+=sparse.coo_matrix((1j*b2,(lineBlock[:,2]-1,lineBlock[:,2]-1)),shape=(busNum,busNum))
+    print(y.sum(1))
+    print(numpy.arange(int(busNum)).shape[0])
+    y+=sparse.coo_matrix((numpy.array(y.sum(1)),(numpy.arange(int(busNum)),numpy.arange(int(busNum)))),shape=(busNum,busNum))
+    #加变压器
+    #TODO:没有考虑变比
+    transX=transBlock[:,3]
+    transR=transBlock[:,4]
+    transGB=1/(transR+1j*transX)
+    y+=sparse.coo_matrix((transGB,(transBlock[:,1]-1,transBlock[:,2]-1)),shape=(busNum,busNum))
\ No newline at end of file
diff --git a/pso.py b/pso.py
index d2fba08..deb35e8 100644
--- a/pso.py
+++ b/pso.py
@@ -1,7 +1,9 @@
 __author__ = 'dmy'
 
 from reader import *
+from YMatrix import *
 
 if __name__=='__main__':
     ieeeData=IEEEData('IEEE4.dat')
+    yMatrix=FormYMatrix(ieeeData.lineBlock,ieeeData.transBlock,ieeeData.busNum)
     print('Finished.')
\ No newline at end of file
diff --git a/reader.py b/reader.py
index 55811cc..7f1d5f0 100644
--- a/reader.py
+++ b/reader.py
@@ -8,9 +8,17 @@ class IEEEData:
         self._seperator=seperator
         self._read()
     def _convertToVector(self,lineVec):#把数据文件按分隔符存成矩阵，像Matlab一样。
-        self._array=numpy.array(lineVec)
-        print(lineVec)
-        print(self._array[0])
+        #先全部转换为列表
+        maxLen=0
+        for v in lineVec:
+            if maxLen<len(v):
+                maxLen=len(v)
+        array=numpy.zeros( (len(lineVec),maxLen),dtype=float)
+        for (i,c) in  enumerate(lineVec):
+            for (j,v) in enumerate(c):
+                array[i,j]=v
+        self._array=array
+        return self._array
 
     def _read(self):
         lineVec=[]
@@ -19,7 +27,35 @@ class IEEEData:
                 if len(line.strip())==0:
                     continue
                 lineVec.append([float(x) for x in line.split(self._seperator)])
-        self._convertToVector(lineVec)
+        array=self._convertToVector(lineVec)
+        self._toLine(array)
+        self._toTrans(array)
+        self._toPQbus(array)
+        self._toPG(array)
+        self._toQG(array)
+        self.busNum=array[0,1]
+
+    def _toTrans(self,array):
+        zeros=numpy.where(array[:,0]==0)[0]
+        self.transBlock=array[zeros[2]+1:zeros[3],:]
+
+    def _toLine(self,array):
+        zeros=numpy.where(array[:,0]==0)[0]
+        lineBlock=array[zeros[0]+1:zeros[1],:]
+        self.lineBlock=lineBlock
+
+    def _toPG(self,array):
+        zeros=numpy.where(array[:,0]==0)[0]
+        self.PGBlock=array[zeros[4]+1:zeros[5],:]
+
+    def _toPQbus(self,array):
+        zeros=numpy.where(array[:,0]==0)[0]
+        self.PQbus=array[zeros[3]+1:zeros[4],:]
+
+    def _toQG(self,array):
+        zeros=numpy.where(array[:,0]==0)[0]
+        self.QG=array[zeros[4]+1:zeros[5],:]
+