Matlab Quick Reference (Page 7 of 12) in pdf

Import matrix from sparse matrix external format

Incomplete LU matrix factorizations

Volumetric slice plot

spconvert

luinc

slice

Preconditioned Conjugate Gradients method

Generate sphere

pcg

sphere

Quasi-Minimal Residual method

Plot discrete surface data

qmr

stem3

Working with Nonzero Entries

Orthogonal-triangular decomposition

Waterfall plot

waterfall

Number of nonzero matrix elements

nnz

Delete column from QR factorization

qrdelete

Nonzero matrix elements

nonzeros

qrinsert

Insert column in QR factorization

Plot Annotation and Grids

Amount of storage allocated for nonzero matrix elements

nzmax

Rank 1 update to QR factorization

qrupdate

Allocate space for sparse matrix

Add contour labels to a contour plot

spalloc

clabel

Apply function to nonzero sparse matrix elements

Date formatted tick labels

spfun

datetick

Sparse Eigenvalues and Singular Values

Replace nonzero sparse matrix elements with ones

Grid lines for 2-D and 3-D plots

spones

grid

Find eigenvalues and eigenvectors

Place text on a 2-D graph using a mouse

eigs

gtext

Find singular values

Graph legend for lines and patches

svds

legend

Visualizing Sparse Matrices

Plot graphs with Y tick labels on the left and right

plotyy

Visualize sparsity pattern

spy

Titles for 2-D and 3-D plots

title

Miscellaneous

X-axis labels for 2-D and 3-D plots

xlabel

Set parameters for sparse matrix routines

spparms

Y-axis labels for 2-D and 3-D plots

ylabel

Reordering Algorithms

Z-axis labels for 3-D plots

zlabel

Column approximate minimum degree permutation

colamd

Plotting and Data Visualization

Sparse column minimum degree permutation

colmmd

Basic Plots and Graphs

Sparse column permutation based on nonzero count

colperm

Surface, Mesh, and Contour Plots

Vertical bar chart

bar

Dulmage-Mendelsohn decomposition

dmperm

Contour (level curves) plot

contour

Horizontal bar chart

barh

Random permutation

randperm

Contour computation

contourc

hist

Plot histograms

Symmetric approximate minimum degree permutation

symamd

Filled contour plot

contourf

Histogram count

histc

Sparse symmetric minimum degree ordering

symmmd

Mesh hidden line removal mode

hidden

Hold current graph

hold

Sparse reverse Cuthill-McKee ordering

symrcm

Combination mesh/contourplot

meshc

Plot using log-log scales

loglog

3-D mesh with reference plane

mesh

Pie plot

pie

A sample function of two variables

peaks

Norm, Condition Number, and Rank

Plot vectors or matrices.

plot

3-D shaded surface graph

surf

1-norm matrix condition number estimate

Polar coordinate plot

condest

polar

Create surface low-level objects

surface

2-norm estimate

Semi-log scale plot

normest

semilogx

Combination surf/contourplot

surfc

Semi-log scale plot

semilogy

3-D shaded surface with lighting

surfl

Create axes in tiled positions

subplot

Sparse Systems of Linear Equations

Triangular mesh plot

trimesh

BiConjugate Gradients method

Triangular surface plot

bicg

trisurf

Three-Dimensional Plotting

BiConjugate Gradients Stabilized method

bicgstab

Conjugate Gradients Squared method

Vertical 3-D bar chart

cgs

bar3

Volume Visualization

Sparse Incomplete Cholesky and Cholesky-Infinity

Horizontal 3-D bar chart

bar3h

cholinc

factorizations

Plot velocity vectors as cones in 3-D vector field

coneplot

3-D comet plot

comet3

Rank 1 update to Cholesky factorization

Draw contours in volume slice plane

cholupdate

contourslice

Generate cylinder

cylinder

Compute the curl and angular velocity of a vector

Generalized Minimum Residual method (with restarts)

gmres

Draw filled 3-D polygons in 3-space

curl

fill3

field

LSQR implementation of Conjugate Gradients on the normal

Plot lines and points in 3-D space

lsqr

plot3

equations

Compute the divergence of a vector field

divergence

3-D quiver (or velocity) plot

quiver3

Matlab Quick Reference Page 7

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