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Binsha

Matplotlib help

Can I ask code help regarding matplotlib ?

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Paul Hobson-2

Re: Matplotlib help

Yes. Be sure to include a small, but working example (that someone can copy/paste and run) that demonstrates the problem you are having along with a clear explanation of what you expect to happen.

-p

On Tue, Mar 19, 2019 at 7:34 PM Binsha S <[hidden email]> wrote:

Can I ask code help regarding matplotlib ?
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[hidden email]
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Binsha

Fwd: Matplotlib help

---------- Forwarded message ---------
From: Binsha S <[hidden email]>
Date: Wed, Mar 20, 2019 at 1:16 PM
Subject: Re: [Matplotlib-users] Matplotlib help
To: Paul Hobson <[hidden email]>

Requirement Description

I am trying to build a gui app for graph plotting. I used multiple files to read and plot as a slideshow. For that first set of data is read and plot then after a time interval it should plot next set of data and so on. I also have play ,pause, forward, backward for the slideshow for plot. Data from the file should be plotted as a slideshow if play button is clicked. For pause button, it should pause the slideshow. Forward and backward button for loop to plot forward play and backward play.

I have a text file contains data as:

-210.00 -10.13672 -10.10742 -10.01953

-209.98 -1.93359 -1.93359 -1.93359

-209.96 -5.36133 -5.33203 -5.33203

---

300.02 -19.74609 -19.71680 -19.68750

What is not working

Error occurs for the clicking of forward, backward, pause buttons.

Multiple data plotting also not showing as a slideshow, one graph multiple data to be plotted and show as a slideshow

What I have tried:

graphgenerate.py

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MplMainWindow(object):

def setupUi(self, MplMainWindow):

MplMainWindow.setObjectName("MplMainWindow")

MplMainWindow.resize(1022, 662)

self.centralwidget = QtWidgets.QWidget(MplMainWindow)

self.centralwidget.setObjectName("centralwidget")

self.upload_btn = QtWidgets.QPushButton(self.centralwidget)

self.upload_btn.setGeometry(QtCore.QRect(80, 30, 91, 41))

self.upload_btn.setObjectName("upload_btn")

self.comboBox = QtWidgets.QComboBox(self.centralwidget)

self.comboBox.setGeometry(QtCore.QRect(180, 40, 181, 22))

self.comboBox.setStyleSheet("background-color: rgb(255, 255, 255);")

self.comboBox.setObjectName("comboBox")

self.graph_label = QtWidgets.QLabel(self.centralwidget)

self.graph_label.setGeometry(QtCore.QRect(730, 40, 47, 16))

self.graph_label.setObjectName("graph_label")

self.backward_btn = QtWidgets.QPushButton(self.centralwidget)

self.backward_btn.setGeometry(QtCore.QRect(550, 30, 41, 31))

self.backward_btn.setStyleSheet("\n"

"\n"

"background-color: rgb(85, 85, 127);\n"

"color: white;\n"

"\n"

"")

self.backward_btn.setObjectName("backward_btn")

self.playbutton = QtWidgets.QPushButton(self.centralwidget)

self.playbutton.setGeometry(QtCore.QRect(590, 30, 41, 31))

self.playbutton.setStyleSheet("\n"

"background-color: rgb(255, 170, 0);\n"

"\n"

"")

self.playbutton.setObjectName("playbutton")

self.pause_button = QtWidgets.QPushButton(self.centralwidget)

self.pause_button.setGeometry(QtCore.QRect(630, 30, 41, 31))

self.pause_button.setStyleSheet("background-color: rgb(255, 170, 0);")

self.pause_button.setObjectName("pause_button")

self.forward_btn = QtWidgets.QPushButton(self.centralwidget)

self.forward_btn.setGeometry(QtCore.QRect(670, 30, 41, 31))

self.forward_btn.setStyleSheet("\n"

"\n"

"background-color: rgb(85, 85, 127);\n"

"color: white;\n"

"\n"

"")

self.forward_btn.setObjectName("forward_btn")

self.time_interval_lbl = QtWidgets.QLabel(self.centralwidget)

self.time_interval_lbl.setGeometry(QtCore.QRect(830, 40, 81, 16))

self.time_interval_lbl.setObjectName("time_interval_lbl")

self.timeinterval_spinbox = QtWidgets.QSpinBox(self.centralwidget)

self.timeinterval_spinbox.setGeometry(QtCore.QRect(900, 30, 41, 31))

self.timeinterval_spinbox.setProperty("value", 3)

self.timeinterval_spinbox.setObjectName("timeinterval_spinbox")

self.MplWidget = MplWidget(self.centralwidget)

self.MplWidget.setGeometry(QtCore.QRect(40, 109, 1251, 511))

self.MplWidget.setObjectName("MplWidget")

self.column_label = QtWidgets.QLabel(self.centralwidget)

self.column_label.setGeometry(QtCore.QRect(370, 40, 47, 13))

self.column_label.setObjectName("column_label")

self.column_Combobox = QtWidgets.QComboBox(self.centralwidget)

self.column_Combobox.setGeometry(QtCore.QRect(420, 30, 91, 31))

self.column_Combobox.setStyleSheet("background-color: rgb(255, 255, 255);")

self.column_Combobox.setObjectName("column_Combobox")

self.column_Combobox.addItem("")

self.graphSpinbox = QtWidgets.QSpinBox(self.centralwidget)

self.graphSpinbox.setGeometry(QtCore.QRect(770, 30, 42, 31))

self.graphSpinbox.setContextMenuPolicy(QtCore.Qt.DefaultContextMenu)

self.graphSpinbox.setMinimum(5)

self.graphSpinbox.setObjectName("graphSpinbox")

self.label = QtWidgets.QLabel(self.centralwidget)

self.label.setGeometry(QtCore.QRect(960, 40, 47, 13))

self.label.setObjectName("label")

self.comboBox_2 = QtWidgets.QComboBox(self.centralwidget)

self.comboBox_2.setGeometry(QtCore.QRect(1010, 21, 69, 41))

self.comboBox_2.setStyleSheet("background-color: rgb(255, 255, 255);\n"

"color:green;\n"

"")

self.comboBox_2.setObjectName("comboBox_2")

self.comboBox_2.addItem("")

MplMainWindow.setCentralWidget(self.centralwidget)

self.menubar = QtWidgets.QMenuBar(MplMainWindow)

self.menubar.setGeometry(QtCore.QRect(0, 0, 1022, 21))

self.menubar.setObjectName("menubar")

MplMainWindow.setMenuBar(self.menubar)

self.statusbar = QtWidgets.QStatusBar(MplMainWindow)

self.statusbar.setObjectName("statusbar")

MplMainWindow.setStatusBar(self.statusbar)

self.retranslateUi(MplMainWindow)

QtCore.QMetaObject.connectSlotsByName(MplMainWindow)

def retranslateUi(self, MplMainWindow):

_translate = QtCore.QCoreApplication.translate

MplMainWindow.setWindowTitle(_translate("MplMainWindow", "MainWindow"))

self.upload_btn.setText(_translate("MplMainWindow", "Upload File"))

self.graph_label.setText(_translate("MplMainWindow", "Graphs:"))

self.backward_btn.setToolTip(_translate("MplMainWindow", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"

"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"

"p, li { white-space: pre-wrap; }\n"

"</style></head><body style=\" font-family:\'MS Shell Dlg 2\'; font-size:8pt; font-weight:400; font-style:normal;\">\n"

"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;color:black; \">Backward</p></body></html>"))

self.backward_btn.setText(_translate("MplMainWindow", "<<"))

self.playbutton.setToolTip(_translate("MplMainWindow", "<html><head/><body><p>Play </p></body></html>"))

self.playbutton.setText(_translate("MplMainWindow", ">"))

self.pause_button.setToolTip(_translate("MplMainWindow", "<html><head/><body><p>Pause</p></body></html>"))

self.pause_button.setText(_translate("MplMainWindow", "||"))

self.forward_btn.setToolTip(_translate("MplMainWindow", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"

"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"

"p, li { white-space: pre-wrap; }\n"

"</style></head><body style=\" font-family:\'MS Shell Dlg 2\'; font-size:8pt; font-weight:400; font-style:normal;\">\n"

"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;color:black;\">Forward</p></body></html>"))

self.forward_btn.setText(_translate("MplMainWindow", ">>"))

self.time_interval_lbl.setText(_translate("MplMainWindow", "Time interval:"))

self.column_label.setText(_translate("MplMainWindow", "Y Data:"))

self.column_Combobox.setItemText(0, _translate("MplMainWindow", "<--Select--->"))

self.label.setText(_translate("MplMainWindow", "X range:"))

self.comboBox_2.setItemText(0, _translate("MplMainWindow", "120"))

self.comboBox_2.setItemText(1, _translate("MplMainWindow", "40"))

self.comboBox_2.setItemText(2, _translate("MplMainWindow", "80"))

self.comboBox_2.setItemText(3, _translate("MplMainWindow", "20"))

self.comboBox_2.setItemText(4, _translate("MplMainWindow", "240"))

from mplwidget import MplWidget

if __name__ == "__main__":

import sys

app = QtWidgets.QApplication(sys.argv)

MplMainWindow = QtWidgets.QMainWindow()

ui = Ui_MplMainWindow()

ui.setupUi(MplMainWindow)

MplMainWindow.show()

sys.exit(app.exec_())

mplwidget.py

from PyQt5 import QtWidgets, QtGui, QtCore

from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas

from matplotlib.figure import Figure

class MplWidget(QtWidgets.QWidget):

def __init__(self, parent=None):

QtWidgets.QWidget.__init__(self, parent)

#self.canvas = FigureCanvas(Figure())

self.fig=Figure()

self.canvas=FigureCanvas(self.fig)

vertical_layout = QtWidgets.QVBoxLayout()

vertical_layout.addWidget(self.canvas)

self.canvas.axes = self.canvas.figure.add_subplot(111)

self.setLayout(vertical_layout)

graphmain.py

from asyncore import loop

from PyQt5 import QtWidgets, QtCore, QtGui

from PyQt5 import *

from PyQt5.QtCore import QEventLoop, QTimer

from PyQt5.QtWidgets import *

from PyQt5.uic import loadUi

from matplotlib.animation import FuncAnimation

from matplotlib.backends.backend_qt5agg import (NavigationToolbar2QT as NavigationToolbar)

import matplotlib.pyplot as plt

import numpy as np

from matplotlib import style

import random

import matplotlib.animation as animation

import os

import shutil

import time

class MatplotlibWidget(QMainWindow):

def __init__(self):

QMainWindow.__init__(self)

loadUi("graphgenerate.ui", self)

self.setWindowTitle("Graph Plotting App")

self.upload_btn.clicked.connect(self.upload_File)

self.playbutton.clicked.connect(self.selectFile)

self.pause_button.clicked.connect(self.stopRun)

self.backward_btn.clicked.connect(self.backward)

self.forward_btn.clicked.connect(self.forward)

self.timeinterval_spinbox.setValue(3)

self.timeinterval_spinbox.setMinimum(1)

self.addToolBar(NavigationToolbar(self.MplWidget.canvas, self))

self.runs=True

self.forwards=True

self.i=0

self.mini = 0

self.maxi = 100

global curr_pos

curr_pos=0

def upload_File(self):

'''fileName,_= QFileDialog.getOpenFileName(None, "Open", "", "All Files (*)")

shutil.copy(fileName,"Files")

file=os.path.split(fileName)[1]

self.comboBox.addItem(file)'''

fname=[]

file_dialog = QFileDialog()

file_dialog.setFileMode(QFileDialog.ExistingFiles)

file_dialog.setOption(QFileDialog.DontUseNativeDialog, True)

file_view = file_dialog.findChild(QListView, 'listView')

# to make it possible to select multiple directories:

if file_view:

file_view.setSelectionMode(QAbstractItemView.MultiSelection)

f_tree_view = file_dialog.findChild(QTreeView)

if f_tree_view:

f_tree_view.setSelectionMode(QAbstractItemView.MultiSelection)

if file_dialog.exec():

paths = file_dialog.selectedFiles()

for p in paths:

sp = os.path.split(p)[1]

fname.append(sp)

shutil.copy(p,"Files")

self.comboBox.addItems(fname)

def selectFile(self):

QtWidgets.QMessageBox.warning(QtWidgets.QMessageBox(), 'Error', 'Please Select File and Column to plot')

self.comboBox.activated[str].connect(self.selectColumn)

def selectColumn(self,i):

global plots,x_arr,y_arr

path = "Files" + "\\" + i

f1 = open(path, 'r')

global data,m,n

data = np.genfromtxt(f1)

m = np.size(data, 0)

n = np.size(data, 1)

col = []

for k in range(1,n):

col.append("Column " + str(k+1))

self.column_Combobox.clear()

self.column_Combobox.addItems(col)

selectedCol= self.column_Combobox.activated[str].connect(self.drawGraph)

def drawGraph(self,i):

col_value=int(i.split()[1])

global x,y,iters,val,gvalue

x = data[:, 0].reshape(m, 1)

y = data[:, col_value-1].reshape(m, 1)

gvalue=self.graphSpinbox.value()

iters=m //(gvalue-1)

global current_iter

current_iter = 0

val=self.timeinterval_spinbox.value()

self.plotData(iters,x,y,current_iter,val,gvalue)

def plotDraw(self,x ,y):

global x_data,y_data

x_data=[]

x_data.append(x)

y_data=[]

y_data.append(y)

self.MplWidget.canvas.axes.clear()

self.MplWidget.canvas.axes.plot(x, y)

self.MplWidget.canvas.axes.legend(('cosinus', 'sinus'), loc='upper right')

self.MplWidget.canvas.axes.set_title('Signal')

self.MplWidget.canvas.draw()

self.MplWidget.canvas.show()

def plotData(self,iters,x,y,current_iter,val,gvalue):

for i in range(gvalue):

self.plotDraw(x[current_iter:current_iter + iters], y[current_iter:current_iter + iters])

sec_value=str(val)+str(0)+str(0)+str(0)

current_iter = current_iter + iters

loop = QEventLoop()

QTimer.singleShot(int(sec_value), loop.quit)

loop.exec_()

def stopRun(self,event=None):

self.runs=False

self.event.stop()

def backward(self):

curr_pos=len(x_data)

if curr_pos!=0:

self.plotData(iters, x_data[curr_pos], y_data[curr_pos], current_iter, val, gvalue)

curr_pos = curr_pos - 1

def forward(self):

print("Forward button clicked")

curr_pos=0

if curr_pos<len(x_data):

print(current_iter,val,gvalue)

self.plotData(iters, x_data[curr_pos], y_data[curr_pos], current_iter, val, gvalue)

curr_pos = curr_pos + 1

if __name__ == "__main__":

app = QApplication([])

window = MatplotlibWidget()

window.showMaximized()

app.exec_()

Please help to fix this

On Wed, Mar 20, 2019 at 9:18 AM Paul Hobson <[hidden email]> wrote:

Yes. Be sure to include a small, but working example (that someone can copy/paste and run) that demonstrates the problem you are having along with a clear explanation of what you expect to happen.
-p

On Tue, Mar 19, 2019 at 7:34 PM Binsha S <[hidden email]> wrote:
Can I ask code help regarding matplotlib ?
_______________________________________________
Matplotlib-users mailing list
[hidden email]
https://mail.python.org/mailman/listinfo/matplotlib-users

_______________________________________________
Matplotlib-users mailing list
[hidden email]
https://mail.python.org/mailman/listinfo/matplotlib-users