title: Problem with peak detection and Annotation of value for graph
body: <pre><code>import matplotlib.pyplot as plt
  import numpy as np
  from scipy.signal import find_peaks
  import pdb
  </code></pre>
  
  <p>The objective of the code is to plot a graph using the data and show the different peaks. Then Annotating the peak values of each peak.</p>
  
  <p>Data </p>
  
  <pre><code>X:-241, Y:-31, Z:17, T:73823
  X:-241, Y:-31, Z:17, T:73952
  X:-240, Y:-30, Z:26, T:74073
  X:-240, Y:-30, Z:26, T:74191
  X:-240, Y:-30, Z:26, T:74312
  X:-240, Y:-32, Z:39, T:74432
  X:-240, Y:-32, Z:39, T:74549
  X:-240, Y:-32, Z:39, T:74668
  X:-239, Y:-21, Z:12, T:74785
  X:-239, Y:-21, Z:12, T:74904
  X:-239, Y:-21, Z:12, T:75022
  X:-246, Y:15, Z:18, T:75142
  X:-246, Y:15, Z:18, T:75260
  X:-246, Y:15, Z:18, T:75378
  X:-250, Y:19, Z:14, T:75498
  X:-250, Y:19, Z:14, T:75615
  X:-250, Y:19, Z:14, T:75732
  X:-239, Y:-5, Z:27, T:75854
  X:-239, Y:-5, Z:27, T:75972
  X:-239, Y:-5, Z:27, T:76102
  X:-236, Y:-19, Z:46, T:76240
  X:-236, Y:-19, Z:46, T:76369
  X:-236, Y:-19, Z:46, T:76489
  X:-235, Y:-14, Z:32, T:76610
  X:-235, Y:-14, Z:32, T:76727
  X:-235, Y:-14, Z:32, T:76845
  X:-244, Y:-16, Z:22, T:76963
  X:-244, Y:-16, Z:22, T:77081
  X:-244, Y:-16, Z:22, T:77201
  X:-220, Y:-25, Z:-3, T:77346
  X:-220, Y:-25, Z:-3, T:77464
  X:-220, Y:-25, Z:-3, T:77580
  X:-229, Y:24, Z:2, T:77699
  X:-229, Y:24, Z:2, T:77814
  X:-229, Y:24, Z:2, T:77934
  X:-248, Y:-20, Z:0, T:78052
  X:-248, Y:-20, Z:0, T:78171
  X:-248, Y:-20, Z:0, T:78288
  X:-242, Y:-15, Z:-35, T:78515
  X:-242, Y:-15, Z:-35, T:78630
  X:-242, Y:-15, Z:-35, T:78747
  X:-235, Y:-12, Z:-63, T:78865
  X:-235, Y:-12, Z:-63, T:78982
  X:-235, Y:-12, Z:-63, T:79102
  X:-226, Y:-35, Z:-145, T:79221
  X:-226, Y:-35, Z:-145, T:79340
  X:-226, Y:-35, Z:-145, T:79461
  X:-205, Y:-47, Z:-156, T:79582
  X:-205, Y:-47, Z:-156, T:79702
  X:-205, Y:-47, Z:-156, T:79821
  X:-208, Y:-39, Z:-149, T:79940
  X:-208, Y:-39, Z:-149, T:80061
  X:-208, Y:-39, Z:-149, T:80181
  X:-235, Y:-16, Z:-99, T:80304
  X:-235, Y:-16, Z:-99, T:80432
  X:-235, Y:-16, Z:-99, T:80657
  X:-247, Y:-10, Z:12, T:80774
  X:-247, Y:-10, Z:12, T:80890
  X:-247, Y:-10, Z:12, T:81008
  X:-242, Y:-1, Z:2, T:81127
  X:-242, Y:-1, Z:2, T:81246
  X:-242, Y:-1, Z:2, T:81363
  X:-239, Y:-8, Z:15, T:81483
  X:-239, Y:-8, Z:15, T:81600
  X:-239, Y:-8, Z:15, T:81720
  X:-241, Y:-13, Z:-11, T:81841
  X:-241, Y:-13, Z:-11, T:81958
  X:-241, Y:-13, Z:-11, T:82076
  X:-242, Y:-5, Z:-37, T:82198
  X:-242, Y:-5, Z:-37, T:82315
  X:-242, Y:-5, Z:-37, T:82435
  X:-215, Y:-43, Z:-128, T:82554
  X:-215, Y:-43, Z:-128, T:82699
  X:-215, Y:-43, Z:-128, T:82829
  X:-207, Y:-48, Z:-153, T:82952
  X:-207, Y:-48, Z:-153, T:83072
  X:-207, Y:-48, Z:-153, T:83191
  X:-198, Y:-37, Z:-166, T:83315
  X:-198, Y:-37, Z:-166, T:83453
  X:-198, Y:-37, Z:-166, T:83572
  X:-218, Y:-33, Z:-134, T:83694
  X:-218, Y:-33, Z:-134, T:83812
  X:-218, Y:-33, Z:-134, T:83932
  X:-228, Y:-15, Z:-80, T:84047
  X:-228, Y:-15, Z:-80, T:84166
  X:-228, Y:-15, Z:-80, T:84288
  X:-243, Y:-8, Z:-4, T:84407
  X:-243, Y:-8, Z:-4, T:84524
  X:-243, Y:-8, Z:-4, T:84640
  X:-238, Y:-4, Z:2, T:84756
  X:-238, Y:-4, Z:2, T:84872
  X:-238, Y:-4, Z:2, T:84994
  X:-252, Y:-7, Z:-16, T:85136
  X:-252, Y:-7, Z:-16, T:85265
  X:-252, Y:-7, Z:-16, T:85385
  X:-243, Y:-3, Z:-28, T:85504
  X:-243, Y:-3, Z:-28, T:85618
  X:-243, Y:-3, Z:-28, T:85739
  X:-241, Y:-3, Z:-48, T:85858
  X:-241, Y:-3, Z:-48, T:85975
  X:-241, Y:-3, Z:-48, T:86094
  X:-231, Y:-15, Z:-112, T:86216
  X:-231, Y:-15, Z:-112, T:86334
  X:-231, Y:-15, Z:-112, T:86453
  X:-210, Y:-43, Z:-150, T:86573
  X:-210, Y:-43, Z:-150, T:86691
  X:-210, Y:-43, Z:-150, T:86811
  X:-193, Y:-58, Z:-169, T:86933
  X:-193, Y:-58, Z:-169, T:87051
  X:-193, Y:-58, Z:-169, T:87171
  X:-182, Y:-27, Z:-179, T:87305
  X:-182, Y:-27, Z:-179, T:87435
  X:-182, Y:-27, Z:-179, T:87566
  X:-212, Y:-19, Z:-136, T:87686
  X:-212, Y:-19, Z:-136, T:87803
  X:-212, Y:-19, Z:-136, T:87920
  X:-233, Y:-25, Z:-83, T:88040
  X:-233, Y:-25, Z:-83, T:88160
  X:-233, Y:-25, Z:-83, T:88278
  X:-243, Y:-16, Z:-31, T:88396
  X:-243, Y:-16, Z:-31, T:88510
  X:-243, Y:-16, Z:-31, T:88625
  X:-244, Y:-13, Z:-27, T:88744
  X:-244, Y:-13, Z:-27, T:88860
  X:-244, Y:-13, Z:-27, T:88978
  X:-243, Y:-15, Z:-51, T:89099
  X:-243, Y:-15, Z:-51, T:89218
  X:-243, Y:-15, Z:-51, T:89338
  X:-228, Y:-27, Z:-78, T:89472
  X:-228, Y:-27, Z:-78, T:89601
  X:-228, Y:-27, Z:-78, T:89746
  X:-223, Y:-24, Z:-114, T:89876
  X:-223, Y:-24, Z:-114, T:89995
  X:-223, Y:-24, Z:-114, T:90115
  X:-205, Y:-42, Z:-141, T:90236
  X:-205, Y:-42, Z:-141, T:90354
  X:-205, Y:-42, Z:-141, T:90474
  X:-199, Y:-67, Z:-153, T:90595
  X:-199, Y:-67, Z:-153, T:90713
  X:-199, Y:-67, Z:-153, T:90833
  X:-202, Y:-53, Z:-152, T:90951
  X:-202, Y:-53, Z:-152, T:91069
  X:-202, Y:-53, Z:-152, T:91191
  X:-224, Y:-41, Z:-135, T:91312
  X:-224, Y:-41, Z:-135, T:91431
  X:-224, Y:-41, Z:-135, T:91549
  X:-229, Y:-29, Z:-91, T:91669
  X:-229, Y:-29, Z:-91, T:91789
  X:-229, Y:-29, Z:-91, T:91923
  X:-242, Y:-8, Z:-2, T:92066
  X:-242, Y:-8, Z:-2, T:92184
  X:-242, Y:-8, Z:-2, T:92302
  X:-233, Y:-12, Z:-5, T:92420
  X:-233, Y:-12, Z:-5, T:92534
  X:-233, Y:-12, Z:-5, T:92654
  X:-246, Y:-1, Z:-4, T:92773
  X:-246, Y:-1, Z:-4, T:92892
  X:-246, Y:-1, Z:-4, T:93010
  X:-242, Y:-9, Z:-23, T:93130
  X:-242, Y:-9, Z:-23, T:93251
  X:-242, Y:-9, Z:-23, T:93370
  X:-237, Y:-19, Z:-46, T:93491
  X:-237, Y:-19, Z:-46, T:93608
  X:-237, Y:-19, Z:-46, T:93727
  X:-213, Y:-23, Z:-95, T:93849
  X:-213, Y:-23, Z:-95, T:93966
  X:-213, Y:-23, Z:-95, T:94112
  X:-207, Y:-36, Z:-151, T:94241
  X:-207, Y:-36, Z:-151, T:94359
  X:-207, Y:-36, Z:-151, T:94480
  X:-199, Y:-49, Z:-162, T:94600
  X:-199, Y:-49, Z:-162, T:94721
  X:-199, Y:-49, Z:-162, T:94840
  X:-203, Y:-36, Z:-146, T:94961
  X:-203, Y:-36, Z:-146, T:95082
  X:-203, Y:-36, Z:-146, T:95202
  X:-222, Y:-28, Z:-124, T:95324
  X:-222, Y:-28, Z:-124, T:95439
  X:-222, Y:-28, Z:-124, T:95583
  X:-244, Y:2, Z:-53, T:95700
  X:-244, Y:2, Z:-53, T:95817
  X:-244, Y:2, Z:-53, T:95935
  X:-237, Y:-5, Z:-9, T:96055
  X:-237, Y:-5, Z:-9, T:96171
  X:-237, Y:-5, Z:-9, T:96301
  X:-239, Y:-2, Z:1, T:96439
  X:-239, Y:-2, Z:1, T:96568
  X:-239, Y:-2, Z:1, T:96685
  X:-243, Y:-4, Z:2, T:96805
  X:-243, Y:-4, Z:2, T:96919
  X:-243, Y:-4, Z:2, T:97037
  X:-246, Y:-3, Z:-16, T:97159
  X:-246, Y:-3, Z:-16, T:97276
  X:-246, Y:-3, Z:-16, T:97395
  X:-239, Y:-8, Z:-42, T:97513
  X:-239, Y:-8, Z:-42, T:97631
  X:-239, Y:-8, Z:-42, T:97752
  X:-221, Y:-10, Z:-115, T:97871
  X:-221, Y:-10, Z:-115, T:97990
  X:-221, Y:-10, Z:-115, T:98109
  X:-219, Y:-25, Z:-145, T:98230
  X:-219, Y:-25, Z:-145, T:98350
  X:-219, Y:-25, Z:-145, T:98468
  X:-202, Y:-31, Z:-172, T:98589
  X:-202, Y:-31, Z:-172, T:98736
  X:-202, Y:-31, Z:-172, T:98865
  X:-214, Y:-34, Z:-144, T:98985
  X:-214, Y:-34, Z:-144, T:99101
  X:-214, Y:-34, Z:-144, T:99223
  X:-224, Y:-24, Z:-116, T:99342
  X:-224, Y:-24, Z:-116, T:99460
  X:-224, Y:-24, Z:-116, T:99579
  X:-232, Y:2, Z:-50, T:99699
  X:-232, Y:2, Z:-50, T:99818
  X:-232, Y:2, Z:-50, T:99936
  X:-241, Y:-4, Z:-22, T:100056
  X:-241, Y:-4, Z:-22, T:100175
  X:-241, Y:-4, Z:-22, T:100293
  X:-240, Y:4, Z:-2, T:100414
  X:-240, Y:4, Z:-2, T:100532
  X:-240, Y:4, Z:-2, T:100648
  X:-241, Y:3, Z:1, T:100768
  X:-241, Y:3, Z:1, T:100895
  X:-241, Y:3, Z:1, T:101029
  X:-243, Y:1, Z:-16, T:101160
  X:-243, Y:1, Z:-16, T:101278
  X:-243, Y:1, Z:-16, T:101399
  X:-239, Y:-2, Z:-36, T:101518
  X:-239, Y:-2, Z:-36, T:101661
  X:-239, Y:-2, Z:-36, T:101780
  X:-228, Y:-12, Z:-71, T:101901
  X:-228, Y:-12, Z:-71, T:102019
  X:-228, Y:-12, Z:-71, T:102138
  X:-224, Y:-23, Z:-118, T:102260
  X:-224, Y:-23, Z:-118, T:102378
  X:-224, Y:-23, Z:-118, T:102498
  X:-209, Y:-2, Z:-161, T:102617
  X:-209, Y:-2, Z:-161, T:102735
  X:-209, Y:-2, Z:-161, T:102855
  X:-206, Y:-3, Z:-150, T:102974
  X:-206, Y:-3, Z:-150, T:103088
  X:-206, Y:-3, Z:-150, T:103216
  X:-218, Y:0, Z:-142, T:103355
  X:-218, Y:0, Z:-142, T:103469
  X:-218, Y:0, Z:-142, T:103581
  X:-226, Y:-17, Z:-118, T:103700
  X:-226, Y:-17, Z:-118, T:103814
  X:-226, Y:-17, Z:-118, T:103931
  X:-242, Y:4, Z:-40, T:104054
  X:-242, Y:4, Z:-40, T:104171
  X:-242, Y:4, Z:-40, T:104292
  X:-242, Y:4, Z:-22, T:104410
  X:-242, Y:4, Z:-22, T:104523
  X:-242, Y:4, Z:-22, T:104642
  X:-240, Y:5, Z:-3, T:104762
  X:-240, Y:5, Z:-3, T:104879
  X:-240, Y:5, Z:-3, T:104993
  X:-244, Y:-2, Z:-6, T:105111
  X:-244, Y:-2, Z:-6, T:105231
  X:-244, Y:-2, Z:-6, T:105361
  X:-244, Y:1, Z:-10, T:105497
  X:-244, Y:1, Z:-10, T:105623
  X:-244, Y:1, Z:-10, T:105744
  X:-244, Y:-4, Z:-34, T:105865
  X:-244, Y:-4, Z:-34, T:105981
  X:-244, Y:-4, Z:-34, T:106101
  X:-231, Y:-1, Z:-63, T:106222
  X:-231, Y:-1, Z:-63, T:106341
  X:-231, Y:-1, Z:-63, T:106462
  X:-222, Y:-11, Z:-116, T:106580
  X:-222, Y:-11, Z:-116, T:106698
  X:-222, Y:-11, Z:-116, T:106818
  X:-219, Y:-15, Z:-144, T:106938
  X:-219, Y:-15, Z:-144, T:107058
  X:-219, Y:-15, Z:-144, T:107174
  X:-204, Y:-6, Z:-150, T:107297
  X:-204, Y:-6, Z:-150, T:107410
  X:-204, Y:-6, Z:-150, T:107528
  X:-196, Y:-5, Z:-163, T:107665
  X:-196, Y:-5, Z:-163, T:107802
  X:-196, Y:-5, Z:-163, T:107935
  X:-214, Y:-2, Z:-153, T:108066
  X:-214, Y:-2, Z:-153, T:108186
  X:-214, Y:-2, Z:-153, T:108306
  X:-223, Y:-12, Z:-123, T:108422
  X:-223, Y:-12, Z:-123, T:108544
  X:-223, Y:-12, Z:-123, T:108661
  X:-230, Y:7, Z:-52, T:108783
  X:-230, Y:7, Z:-52, T:108900
  X:-230, Y:7, Z:-52, T:109019
  X:-241, Y:9, Z:-25, T:109139
  X:-241, Y:9, Z:-25, T:109258
  X:-241, Y:9, Z:-25, T:109375
  X:-245, Y:4, Z:-12, T:109496
  X:-245, Y:4, Z:-12, T:109612
  X:-245, Y:4, Z:-12, T:109732
  X:-242, Y:3, Z:-6, T:109852
  X:-242, Y:3, Z:-6, T:109968
  X:-242, Y:3, Z:-6, T:110098
  X:-239, Y:-4, Z:-35, T:110243
  X:-239, Y:-4, Z:-35, T:110362
  X:-239, Y:-4, Z:-35, T:110484
  X:-235, Y:6, Z:-65, T:110606
  X:-235, Y:6, Z:-65, T:110722
  X:-235, Y:6, Z:-65, T:110840
  X:-215, Y:-14, Z:-117, T:110962
  X:-215, Y:-14, Z:-117, T:111081
  X:-215, Y:-14, Z:-117, T:111204
  X:-224, Y:7, Z:-146, T:111324
  X:-224, Y:7, Z:-146, T:111441
  X:-224, Y:7, Z:-146, T:111561
  X:-209, Y:-6, Z:-149, T:111679
  X:-209, Y:-6, Z:-149, T:111799
  X:-209, Y:-6, Z:-149, T:111919
  X:-219, Y:-8, Z:-140, T:112038
  X:-219, Y:-8, Z:-140, T:112157
  X:-219, Y:-8, Z:-140, T:112274
  X:-226, Y:-3, Z:-116, T:112405
  X:-226, Y:-3, Z:-116, T:112540
  X:-226, Y:-3, Z:-116, T:112669
  X:-233, Y:2, Z:-76, T:112792
  X:-233, Y:2, Z:-76, T:112909
  X:-233, Y:2, Z:-76, T:113028
  X:-237, Y:7, Z:-35, T:113148
  X:-237, Y:7, Z:-35, T:113266
  X:-237, Y:7, Z:-35, T:113386
  X:-242, Y:5, Z:-15, T:113504
  X:-242, Y:5, Z:-15, T:113624
  X:-242, Y:5, Z:-15, T:113764
  X:-244, Y:5, Z:-3, T:113884
  X:-244, Y:5, Z:-3, T:113999
  X:-244, Y:5, Z:-3, T:114118
  X:-242, Y:3, Z:-7, T:114239
  X:-242, Y:3, Z:-7, T:114357
  X:-242, Y:3, Z:-7, T:114473
  X:-241, Y:0, Z:-30, T:114595
  X:-241, Y:0, Z:-30, T:114720
  X:-241, Y:0, Z:-30, T:114867
  X:-227, Y:-13, Z:-95, T:114989
  X:-227, Y:-13, Z:-95, T:115104
  X:-227, Y:-13, Z:-95, T:115224
  X:-212, Y:-5, Z:-114, T:115343
  X:-212, Y:-5, Z:-114, T:115462
  X:-212, Y:-5, Z:-114, T:115579
  X:-215, Y:-6, Z:-145, T:115701
  X:-215, Y:-6, Z:-145, T:115819
  X:-215, Y:-6, Z:-145, T:115937
  X:-210, Y:5, Z:-142, T:116059
  X:-210, Y:5, Z:-142, T:116176
  X:-210, Y:5, Z:-142, T:116296
  X:-222, Y:-19, Z:-145, T:116415
  X:-222, Y:-19, Z:-145, T:116534
  X:-222, Y:-19, Z:-145, T:116655
  X:-231, Y:6, Z:-119, T:116775
  X:-231, Y:6, Z:-119, T:116894
  X:-231, Y:6, Z:-119, T:117023
  </code></pre>
  
  <p>Code for import:</p>
  
  <pre><code>file = open("Data1r2.txt", 'r')
  lines = file.readlines()
  file.close()
  
  t = []
  z = []
  y = []
  x = []
  
  for line in lines:
  
  parts = line.split(", ")
  if len(parts) &gt; 3:
      column1 = parts[3].split(':')
      column2 = column1[1]
  
      column3 = parts[2].split(':')
      column4 = column3[1]
  
      column5 = parts[1].split(':')
      column6 = column5[1]
  
      column7 = parts[0].split(':')
      column8 = column7[1]
  
      T = column2[0:len(column2)]
      Z = column4[0:len(column4)]
      Y = column6[0:len(column6)]
      X = column8[0:len(column8)]
  
     # pdb.set_trace()
  
      T1 = float(T)
      t.append(T1)
  
      Z1 = float(Z)
      z.append(Z1)
  
      Y1 = float(Y)
      y.append(Y1)
  
      X1 = float(X)
      x.append(X1)
  
  fig = plt.figure()
  ax = fig.add_subplot(111)
  </code></pre>
  
  <p>This part of the code is for the peak detection for my highest peak.</p>
  
  <pre><code>zz = np.array(z)  
  peaks, _ = find_peaks(zz, height = -50 )
  plt.plot(zz)
  plt.plot(peaks, zz[peaks],'o')
  plt.plot(np.zeros_like(x), "--", color="gray")
  </code></pre>
  
  <p>This part im trying to annotate the highest peak value. The problem now is when i run it it will show 2 graph instead of 1. it suppose to be the same 1 graph but showing the peaks and annotate the peak values.</p>
  
  <p><img src="https://i.stack.imgur.com/kWQkr.jpg" alt="Picture of the 2 graphs"></p>
  
  <p><img src="https://i.stack.imgur.com/0CteI.jpg" alt="Picture of the other graph"></p>
  
  <pre><code>line, = ax.plot(t, z)
  
  ymax = max(z)
  xpos = z.index(ymax)
  xmax = t[xpos]
  
  
  text= "x={:.1f}, y={:.1f}".format(xmax, ymax)
  ax.annotate(text, xy=(xmax, ymax), xytext=(xmax, ymax),
          arrowprops=dict(facecolor='black', shrink=0.05),
          )
  
   ax.set_ylim(-150,100)
  #ax.set_xlim(70000,110000)
  
  plt.legend()
  plt.show()
  </code></pre>