whats new in matlab - matlab expo · pdf filegraphs in matlab...
TRANSCRIPT
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1© 2015 The MathWorks, Inc.
What’s New in MATLAB 2015
Joe Hicklin
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Talks showing off new features
What’s New in Simulink in Releases 2015a and 2015b
– 11:15–11:45
Machine Learning for Predictive Modelling
– 14:30 – 15:15
Development and Testing of Robotic Applications Using MATLAB and
Simulink
– 16:15 – 17:00
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A quick look at some new features
MATLAB
Compiler
SDKC/
C
++ Java .NETPython
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New Axis Location: origin
x = -10:0.01:10;
plot(x, sinc(x))
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New Axis Location: origin
x = -10:0.01:10;
plot(x, sinc(x))
set (gca, 'xaxislocation', 'origin' )
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New Axis Location: origin
x = -10:0.01:10;
plot(x, sinc(x))
set( gca, 'xaxislocation', 'origin' )
set( gca, 'yaxislocation', 'origin' )
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Bivariate Histograms
x = randn(100000, 1);
histogram(x)
X
Y
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Bivariate Histograms
x = randn(100000, 1);
y = x .* randn(100000, 1);
histogram2(x,y)
X
Y
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Array Size Limit
Have you done this?% I need an array with a million elements
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Array Size Limit
Have you done this?% I need an array with a million elements
V = rand(1000000);
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Array Size Limit
Have you done this?% I need an array with a million elements
V = rand(1000000);
What happens now?
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Array Size Limit
Have you done this?% I need an array with a million elements
V = rand(1000000);
What happens now?
Error using rand
Requested 1000000x1000000 (7450.6GB) array exceeds maximum array size
preference.
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Array Size Limit
Error using rand
Requested 1000000x1000000 (7450.6GB) array exceeds maximum array size
preference.
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Working with “Grouped Data”
What is the average departure delay for each airline?
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Working with “Grouped Data”
[ groups, airline] = findgroups( T.UniqueCarrier );
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Working with “Grouped Data”
meanDelay = splitapply( @mean, T.DepDelay, groups );
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Working with “Grouped Data”
[groups, airline] = findgroups(T.UniqueCarrier);
meanDelay = splitapply( @mean, T.DepDelay, groups);
table(airline, meanDelay)
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We support many types of hardware
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We have added support
for two popular new
systems:
Raspberry Pi 2
900 MHz
Quad core
1 GB ram
And now there are two more
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We have added support
for two popular new
systems:
BeagleBone Black
1 GHz
512 MB ram
4GB flash rom
3D Graphics
And now there are two more
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Python Integration
MATLAB integrates with several programming languages:
– C/C++
– Java
– FORTRAN
– COM
– .NET
– Python
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Call Python from MATLABMATLAB Interface to Python
Java
COM
C/C++
Fortran
.NET
Python
>> s = py.string.Template( ... 'Patient Name: $who')
>> substitute(s,pyargs('who','Smith'))
Patient Name: Smith
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Call MATLAB from PythonMATLAB Engine API
C/C++
Fortran
.NET
COM
Python
>>> import matlab.engine>>> eng = matlab.engine.start_matlab()>>> eng.sqrt(9.0)3.0
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Deploy MATLAB Components for Python
MATLAB Compiler SDK
– Creates deployable MATLAB components for
integration with applications written in Python
MATLAB
Compiler SDK
C/C ++ Java .NET Python
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Graphs in MATLAB
A directed graph
with four nodes
and three edges.
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Graphs in MATLAB
A Graph object
Create
Manipulate
Analyze
A GraphPlot object
View
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Let’s make a simple Graph
sourceNodes = [ 1 1 1 2 2 3 3 4 5 5 6 7 ];
targetNodes = [ 2 4 8 3 7 4 6 5 6 8 7 8 ];
G = graph( sourceNodes , targetNodes )
G =
graph with properties:
Edges: [12x1 table]
Nodes: [8x0 table]
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P = plot(G);
sourceNodes = [1 1 1 2 2 3 3 4 5 5 6 7];
targetNodes = [2 4 8 3 7 4 6 5 6 8 7 8];
Plot a Graph
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Plot a Graph
layout( P,'circle' )
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Are these drawings of the same graph?
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Plot a Graph
layout(P, 'layered' )
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Plot a Graph
layout( P, 'force' );
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Graphs in MATLAB
load('MinnesotaRoads');
plot(G);
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Graphs in MATLAB
G.Nodes( 1:7,: )
ans =
Longitude Latitude
_________ ________
-97.207 49.001
-96.801 49
-95.957 49
-95.931 49
-95.766 49
-95.378 48.999
-97.2 48.972
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P = plot(G, 'XData', G.Nodes.Longitude, 'YData', G.Nodes.Latitude);
Graphs in MATLAB
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Useful Graph Algorithms
shortestpath Shortest path between two single nodes
shortestpathtree Shortest path tree from node
distances Shortest path distances of all node pairs
bfsearch Breadth-first graph search
dfsearch Depth-first graph search
maxflow Maximum flow in graph
conncomp Connected graph components
minspantree Minimum spanning tree of graph
toposort Topological order of directed acyclic graph
isdag Determine if graph is acyclic
transclosure Transitive closure
transreduction Transitive reduction
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Graphs in MATLAB
P.labelnode(cityIDs, cityNames);
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Graphs in MATLAB
P.labelnode(cityIDs, cityNames);
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Graphs in MATLAB
T = shortestpath(G,Minneapolis,Moorhead);
P.highlight(T,'EdgeColor','r);
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Graphs in MATLAB
T = shortestpath(G,Minneapolis,Moorhead);
P.highlight(T,'EdgeColor','r');
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Graphs in MATLAB
P.NodeCData = distances(G, Minneapolis);
title('Distance from Minneapolis (miles)');
colorbar
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Graphs in MATLAB
P.NodeCData = distances(G, Minneapolis);
title('Distance from Minneapolis (miles)');
colorbar
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Minnesota gets a lot of snow.
You plow the snow
Your equipment is in Minneapolis
You don’t have to plow every road
Drivers must be able to get from
every town to every other town
What is the least you must plow?tree = minspantree(G,'root',minneapolis);
highlight(P,tree, 'LineWidth', 3);
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Minnesota gets a lot of snow.
You plow the snow
Your equipment is in Minneapolis
You don’t have to plow every road
Drivers must be able to get from
every town to every other town
What is the least you must plow?tree = minspantree(G,'root',minneapolis);
highlight(P,tree, 'LineWidth', 3);
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Add-On Explorer
The File Exchange on
MATLAB Central
About 20,000 submissions
An underused resource
Awareness
Complexity
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Add-On Explorer
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Add-On Explorer
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Add-On Explorer
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Add-On Explorer
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Add-On Explorer
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Add-On Explorer
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Add-On Explorer
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Add-On Manager
demoDrawTubularMesh
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Add-On Explorer
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Add-On Manager
demoDrawTubularMesh
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Add-On Manager
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Add-On Manager
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Add-On Explorer
I searched for “Vibration”
133 results
“Spectral”
512 results
“Machine Learning”
125 results
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Add-On Explorer
Don’t start doing this when you have a deadline!
Vibration
Spectral
Machine Learning
Support Vector
Classify
Detect
Control
Control Phase
Love
Beauty
Truth
Beer
Monkey
Yogurt
133
512
125
226
411
1342
3919
191
26
26
84
10
3
0
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MATLAB Execution Engine
MATLAB
Math GraphicsLanguage
R2014b
Graphics
R2015b
Language
“LXE”
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MATLAB Execution Engine
Old system had two different execution mechanisms – a JIT and an Interpreter.
New system has a single execution mechanism.
Old JIT was designed for FORTRAN-like constructs within MATLAB.
New JIT is designed for the entire MATLAB language.
Old system had a monolithic architecture that was difficult to extend.
New system has a Modular, Thread-safe, and Platform re-targetable architecture.
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MATLAB Execution EnginePerformance Improvement Highlights
Econometrics Toolbox: American Basket Demo executes 60% faster
Image processing with active contours executes 32% faster
SVM classification for Machine Learning executes 12% faster
Examples used in “Speeding up MATLAB” webinar execute 30% faster
k-NN classification for Machine Learning executes 37% faster
Machine Learning classification executes 25% faster
Image Processing executes 15% faster
Performance in Object-Oriented MATLAB Code on File Exchange executes 10-40% faster
Wireless Application demo executes 50% faster
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Application Level Benchmarks Jan. 2015
Tests faster with the LXE
0 0 0 0 0
8
29
17
11
8
10
3
0
5
10
15
20
25
30
35
# o
f Tests
~ Same
(43%)Tests slower with LXE
(0%)
99% on par or faster with LXE
64% more than 10% faster
37% more than 25% faster
(57%)
Performance Ratio
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Tests slower with the LXE Tests faster with the LXE
Core and Toolbox UPS tests Jan. 2015
Lower-level tests show more variability
213 10
34
133
326340
299
268253
175
31
0
50
100
150
200
250
300
350
400
# o
f Tests
(10%) (55%)
~ Same (35%)
90% on par or faster with LXE
55% more than 10% faster
39% more than 25% faster
Performance Ratio
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MATLAB Execution Engine
Summary
R2015b runs MATLAB programs faster than previous releases.
We will to continue to increase performance.
We will add new features more easily and more quickly.
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What’s New in MATLAB 2015
MATLAB
Compiler
SDKC/
C
++ Java .NETPython