iFit/isempty

PURPOSE

SYNOPSIS

DESCRIPTION

 isempty(s) : true for empty iData object

   @iData/isempty true for empty iData object

 input:  s: object or array (iData)
 output: false(0) or true(1) whether Signal is empty in the objects
 ex :    isempty(iData)

 Version: Nov. 27, 2018
 See also iData, iData/disp, iData/get, iData/size

CROSS-REFERENCE INFORMATION

• end b = end(s,index,n) : end value for iData objects
• size size(s) : get iData object size (number of elements)
• zeros s = zeros(s,N,M,P,...) : initialize an iData array

• camproj s = camproj(a,dim) : projection/radial integration of iData objects elements
• cart2sph s = cart2sph(a,dim) : cartesian to polar/spherical representation of iData objects
• cat s = cat(dim,a,...) : catenate iData objects elements along dimension
• caxis c = caxis(s, h) : Use the 2D/3D data as the colormap (CData property) in current object.
• cell [content,fields]=cell(s) : convert iData objects into cells
• clim b = clim(s,[ cmin cmax ]) : Reduce iData C axis limits
• colon b = colon(s) : vector of arrays
• colormap h=colormap(objects, colormaps, ..., options): Produce surfaces from iData 2D objects with different colormaps
• commandhistory commandhistory(s) : show the command history of iData object
• cwt b = cwt(s,dim,scales,wname,'wname',...) : Continuous wavelet transform
• deconv c = deconv(a,b) : computes the deconvolution of iData objects
• disp disp(s) : display iData object (details)
• display d = display(s) : display iData object (from command line)
• doc doc(iData): iData web page documentation
• edit edit(s) : edit iData object Signal/Monitor
• event c = event(a) : build an event list
• fft c = fft(a) : computes the Discrete Fourier transform of iData objects
• fileattrib [attribute, link] = fileattrib(s, field) : return a field Attribute
• fill FILL fill-in over missing data
• findfield [match, types, nelements]=findfield(iData, field, option) : look for iData fields
• findobj [s,...]=findobj(s,...) : look for existing iData objects
• findstr [match, field]=findstr(s, str, option) : look for strings stored in iData
• fits [pars,criteria,message,output] = fits(a, model, pars, options, constraints, ...) : fit data set on a model
• get [...] = get(s, 'PropertyName', ...) : get iData object properties
• getalias [link, label,names] = getalias(s, 'AliasName') : get iData alias
• getaxis [val, lab] = getaxis(s, AxisIndex) : get iData axis value and label
• help c = help(s) : display iData information as a Dialogue window
• hist hist(a, axis1, axis2, ...) computes the accumulated histogram from event data sets
• iData
• image h = image(r,g,b, option) : Plot up to 3 images overlayed on the RGB channels
• imroi imroi: define a region of interest on a data set
• interp [b...] = interp(s, ...) : interpolate iData object
• isequal c = isequal(a,b) : full numerical equality comparison of iData objects
• isfield b = isfield(s, field) : check existence of field/alias in iData objects
• jacobian [b, j] = jacobian(a, new_axes, 'new_axes_labels'...) : computes the gradient (derivative) of iData objects
• kmeans [b,c] = kmeans(X, k) : k-means clustering of iData object
• label b = label(s, alias, label) : Change iData label for a given alias/axis
• linspace v = linspace(a,b,n) : creates a linearly spaced vector of objects
• load d = load(s, file, loader, ...): iData file loader
• logspace v = logspace(a,b,n) : creates a logarithmically spaced vector of objects
• max [m,id] = max(a,b, dim) : computes the maximum value of iData object(s)
• meshgrid s = meshgrid(a) : transforms an iData object so that its axes are grids
• min [m,id] = min(a,b, dim) : computes the maximum value of iData object(s)
• pack b = pack(a) : compress iData storage to save memory
• peaks [half_width, center, amplitude, baseline] = peaks(s, dim, m) : peak position and width of iData
• permute c = permute(a, order) : Permute object dimensions from iData objects/arrays
• plot h = plot(s, method, ...) : plot iData object
• reducevolume h = reducevolume(s, factor) : reduce an iData object size
• reshape c = reshape(a) : reshape the object Signal
• resize c = resize(a) : resize/rebin the object Signal
• rmalias s = rmalias(s, AliasName) : removes iData aliases
• rmaxis s = rmaxis(s, Axis) : delete iData axes
• rotate s = rotate(a, theta) : computes the rotation of iData objects around the origin
• saveas f = saveas(s, filename, format, options) : save iData object into various data formats
• set [s,...] = set(s, 'PropertyName', Propertyvalue, ...) : set iData properties
• setalias [s,...] = setalias(s, AliasName, AliasLink, {AliasLabel}) : set iData aliases
• setaxis s = setaxis(s, rank, alias, value) : set iData axes
• slice slice(s) : Plot a 2D/3D object with slice rendering
• smooth Z = smooth(Y) : smooth iData objects
• squeeze c = squeeze(a) : remove singleton dimensions from iData objects/arrays
• std [half_width, center] = std(s, dim) : standard deviation of iData
• subplot h = subplot(s) : plot iData array as subplots
• subsasgn b = subsasgn(a,index,b) : iData indexed assignement
• subsref b = subsref(a,s) : iData indexed references
• union [ai,bi] = union(a, b) : computes object union area and values
• xlabel b = xlabel(s,label) : Change iData X axis label
• xlim b = xlim(s,[ xmin xmax ]) : Reduce iData X axis limits
• ylabel b = ylabel(s,label) : Change iData Y axis label
• ylim b = ylim(s,[ ymin ymax ]) : Reduce iData Y axis limits
• zeros s = zeros(s,N,M,P,...) : initialize an iData array
• zlim b = zlim(s,[ zmin zmax ]) : Reduce iData Z axis limits