diff --git a/synthDC/ppa.py b/synthDC/ppa.py
index 4d1657771..1eefb1021 100755
--- a/synthDC/ppa.py
+++ b/synthDC/ppa.py
@@ -1,28 +1,37 @@
 #!/usr/bin/python3
-# from msilib.schema import File
+#from msilib.schema import File
 import subprocess
 from multiprocessing import Pool
 import csv
 import re
-# import matplotlib.pyplot as plt
-# import numpy as np
+import matplotlib.pyplot as plt
+import numpy as np
 
-print("hi")
 
-def run_command(module, width, freq):
-    command = "make synth DESIGN=ppa_{}_{} TECH=sky90 DRIVE=INV FREQ={} MAXOPT=1".format(module, width, freq)
+def run_command(module, width, tech, freq):
+    command = "make synth DESIGN=ppa_{}_{} TECH={} DRIVE=INV FREQ={} MAXOPT=1".format(module, width, tech, freq)
     subprocess.Popen(command, shell=True)
 
-widths = ['16']
-modules = ['shifter']
-freqs = ['10']
+def deleteRedundant(LoT):
+    '''not working'''
+    synthStr = "rm -rf runs/ppa_{}_{}_rv32e_{}_{}_*"
+    for synth in LoT:        
+        print(synth)
+        bashCommand = synthStr.format(*synth)
+        outputCPL = subprocess.check_output(['bash','-c', bashCommand])
 
+widths = ['8']
+modules = ['add']
+freqs = ['10']
+tech = 'sky90'
 
 LoT = []
 for module in modules:
     for width in widths:
         for freq in freqs:
-            LoT += [[module, width, freq]]
+            LoT += [[module, width, tech, freq]]
+
+deleteRedundant(LoT)
 
 pool = Pool()
 pool.starmap(run_command, LoT)
@@ -45,13 +54,11 @@ allSynths = []
 
 for i in range(len(linesCPL)):
     line = linesCPL[i]
-    oneSynth = []
     mwm = wm.findall(line)[0][4:-4].split('_')
-    oneSynth += [mwm[0]]
-    oneSynth += [mwm[1]]
-    oneSynth += [f.findall(line)[0][1:-4]]
-    oneSynth += cpl.findall(line)
-    oneSynth += da.findall(linesDA[i])
+    oneSynth = [mwm[0], int(mwm[1])]
+    oneSynth += [int(f.findall(line)[0][1:-4])]
+    oneSynth += [float(cpl.findall(line)[0])]
+    oneSynth += [float(da.findall(linesDA[i])[0])]
     allSynths += [oneSynth]
 
 file = open("ppaData.csv", "w")
@@ -61,4 +68,43 @@ writer.writerow(['Module', 'Width', 'Target Freq', 'Delay', 'Area'])
 for one in allSynths:
     writer.writerow(one)
 
-file.close()
\ No newline at end of file
+file.close()
+
+
+def plotPPA(module, freq, var):
+    '''
+    module: string module name
+    freq: int freq (GHz)
+    var: string 'delay' or 'area'
+    plots chosen variable vs width for all matching syntheses with regression
+    '''
+    global allSynths
+    ind = 3 if (var == 'delay') else 4
+    widths = []
+    ivar = []
+    for oneSynth in allSynths:
+        if (oneSynth[0] == module) & (oneSynth[2] == freq):
+            
+            widths += [oneSynth[1]]
+            ivar += [oneSynth[ind]]
+
+    x = np.array(widths, dtype=np.int)
+    y = np.array(ivar, dtype=np.float)
+
+    A = np.vstack([x, np.ones(len(x))]).T
+    m, c = np.linalg.lstsq(A, y, rcond=None)[0]
+    z = np.polyfit(x, y, 2)
+    p = np.poly1d(z)
+
+    xp = np.linspace(0, 140, 200)
+
+    _ = plt.plot(x, y, 'o', label=module, markersize=10)
+    _ = plt.plot(x, m*x + c, 'r', label='Linear fit')
+    _ = plt.plot(xp, p(xp), label='Quadratic fit')
+    _ = plt.legend()
+    _ = plt.xlabel("Width (bits)")
+    _ = plt.ylabel(str.title(var))
+    plt.show()
+
+
+plotPPA('add', 5000, 'delay')
\ No newline at end of file