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POLogical indexing of fields within a structure
 

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    <p>I have a structure like so:</p> <pre><code>Basis.FieldsBasisType.fieldsBasisComponents </code></pre> <p>There are ~13 components to each basis, including 6 asset class IDs.</p> <p>So, for example </p> <p>fieldnames(Basis.SalaryIncrease) =</p> <pre><code>'Constant' 'AWeight' 'AAssetClassID' 'ATimeLag' 'BWeight' 'BAssetClassID' 'BTimeLag' 'CWeight' 'CAssetClassID' 'CTimeLag' 'DWeight' 'DAssetClassID' 'DTimeLag' 'EWeight' 'EAssetClassID' 'ETimeLag' 'FWeight' 'FAssetClassID' 'FTimeLag' 'cap' 'floor' </code></pre> <p>Now what I want to do is select all unique asset classes used in any basis. I am really struggling to make this neat though, currently I am using:</p> <pre><code>basisNames = fieldnames(Basis); requiredSeries=[]; for i = 1:size(fieldnames(Basis),1) requiredSeries = [requiredSeries;unique(Basis.(basisNames{i}).AAssetClassID)]; requiredSeries = [requiredSeries;unique(Basis.(basisNames{i}).BAssetClassID)]; requiredSeries = [requiredSeries;unique(Basis.(basisNames{i}).CAssetClassID)]; requiredSeries = [requiredSeries;unique(Basis.(basisNames{i}).DAssetClassID)]; requiredSeries = [requiredSeries;unique(Basis.(basisNames{i}).EAssetClassID)]; requiredSeries = [requiredSeries;unique(Basis.(basisNames{i}).FAssetClassID)]; end requiredSeries = unique(requiredSeries) </code></pre> <p>Which is really ugly in my opinion. I want to do some kind of string compare to find 'AssetClassID' within the fields, so something like:</p> <pre><code>field = fieldnames(Basis.(basisNames{1})); strfind(field,'AssetClassID'); </code></pre> <p>And then use that cell array to logically index 'field' and just grab the data from 'AssetClassID' fields. But I am stuck on making that work.</p> <pre><code>~cellfun('isempty',strfind(field,'AssetClassID')) </code></pre> <p>gets me the logical index, how do I apply that to fields and then use it to get values. </p> <p>Any ideas would be appreciated, I feel there should be a neat way of doing it and I am missing something. Hardcoding those fieldnames seems short sighted as a solution.</p> # <p>Edit: I hate myself.</p> <p>Sorry folks, I came up with a working variant like moments after posting this, apologies for wasting anyones time!</p> <pre><code>basisNames = fieldnames(Basis); for i = 1:size(fieldnames(Basis),1) field = fieldnames(Basis.(basisNames{i})); field = cell2mat(field(~cellfun('isempty',strfind(field,'AssetClassID')))); for j = 1:size(field,1) requiredSeries = [requiredSeries;unique(Basis.(basisNames{i}).(field(1,:)))]; end requiredSeries = unique(requiredSeries) end </code></pre> <p>I was missing a necessary cell2mat earlier which caused the inability to get it to bloody work. Anyway, I'd always like to hear improvements to that but otherwise you can shut this down.</p>
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    1. CO@michelle I would have done but I could not answer my own question for 8 hours after posting due to being new or something. I could do so now, if that is the correct way to behave in this situation. I wanted to post straight away to avoid anyone wasting time on this.
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