## Plotting graph using for loop in MATLAB

Why this happens… With plot(x(i),y) you are plotting 100 single points (one in each iteration) and they are not shown by default. Therefore the plot looks empty. Solution 1: Vectorized calculation and direct plot I assume you meant to draw a continuous line. In that case no for-loop is needed because you can calculate and … Read more

## SwiftUI Line Graph Animation using Vector Arithmetic

Why do you want to avoid Metal? Enabling its support is as easy as wrapping your LineGraphShapes into Group and modifying it with a drawingGroup(). Try it out: … Group { let gradient = LinearGradient( gradient: Gradient(colors: [Color.red, Color.blue]), startPoint: .leading, endPoint: .trailing ) LineGraphShape(points: points[selectedPointType], closePath: true) .fill(gradient) LineGraphShape(points: points[selectedPointType], closePath: false) .stroke( gradient, … Read more

## Tensorflow: How to convert .meta, .data and .index model files into one graph.pb file

You can use this simple script to do that. But you must specify the names of the output nodes. import tensorflow as tf meta_path=”model.ckpt-22480.meta” # Your .meta file output_node_names = [‘output:0’] # Output nodes with tf.Session() as sess: # Restore the graph saver = tf.train.import_meta_graph(meta_path) # Load weights saver.restore(sess,tf.train.latest_checkpoint(‘path/of/your/.meta/file’)) # Freeze the graph frozen_graph_def = … Read more

## Iterative DFS vs Recursive DFS and different elements order

Both are valid DFS algorithms. A DFS does not specify which node you see first. It is not important because the order between edges is not defined [remember: edges are a set usually]. The difference is due to the way you handle each node’s children. In the iterative approach: You first insert all the elements … Read more

Categories c++

## Export a graph to .eps file with R

The easiest way I’ve found to create postscripts is the following, using the setEPS() command: setEPS() postscript(“whatever.eps”) plot(rnorm(100), main=”Hey Some Data”) dev.off()

## draw polar graph in java

You might like to look at Lissajous curves; an example of a = 5, b = 4 (5:4) is shown below. Addendum: Once you see how to plot points in xy coordinates, then you should look at converting between polar and Cartesian coordinates. public class LissajousPanel extends JPanel { private static final int SIZE = … Read more

## Finding all the shortest paths between two nodes in unweighted undirected graph

As a caveat, remember that there can be exponentially many shortest paths between two nodes in a graph. Any algorithm for this will potentially take exponential time. That said, there are a few relatively straightforward algorithms that can find all the paths. Here’s two. BFS + Reverse DFS When running a breadth-first search over a … Read more

## Destroy chart.js bar graph to redraw other graph in same

The correct method to use, in order to be able to draw another chart on the same canvas, is .destroy(). You must call it on the previously created chart object. You may also use the same variable for both charts. var grapharea = document.getElementById(“barChart”).getContext(“2d”); var myChart = new Chart(grapharea, { type: ‘bar’, data: barData, options: … Read more

## Representing graphs (data structure) in Python

Even though this is a somewhat old question, I thought I’d give a practical answer for anyone stumbling across this. Let’s say you get your input data for your connections as a list of tuples like so: [(‘A’, ‘B’), (‘B’, ‘C’), (‘B’, ‘D’), (‘C’, ‘D’), (‘E’, ‘F’), (‘F’, ‘C’)] The data structure I’ve found to … Read more

## What is better, adjacency lists or adjacency matrices for graph problems in C++?

It depends on the problem. Adjacency Matrix Uses O(n^2) memory It is fast to lookup and check for presence or absence of a specific edge between any two nodes O(1) It is slow to iterate over all edges It is slow to add/delete a node; a complex operation O(n^2) It is fast to add a … Read more

Categories c++