Thread Subject:

how to make a heatmap like Nasdaq dynamic one?

Hi all,

I have the following two 7*8 matrices at hand:
Ticker =

    'LLY' 'COP' 'HMC' 'C' 'NFLX' 'BAC' 'STP' 'TOT'
    'NOK' 'PG' 'TM' 'LVMUY' 'UTX' 'BIDU' 'TSLA' 'DDAIF'
    'RIMM' 'KO' 'T' 'BHP' 'AMD' 'SINA' 'MSFT' 'PTR'
    'BK' 'WMT' 'CSCO' 'QCOM' 'NWSA' 'DANG' 'SAP' 'PEP'
    'SAN' 'JNJ' 'AXP' 'NSC' 'MCD' 'YOKU' 'SI' 'BCS'
    'AIG' 'GE' 'LNKD' 'BBVA' 'SBUX' 'RENN' 'MET' 'LYG'
    'COH' 'F' 'AVP' 'HRL' 'POT' 'QIHU' 'JPM' 'HBC'

and the corresponding returns figuresTotalReturns =

    0.0718 -0.2670 0.0174 0.0476 -0.1903 0.3203 -0.9822 -0.0510
   -0.6003 0.0054 0.1610 0.1023 0.0672 -0.1091 0.0155 0.0253
   -0.8409 -0.6288 0.1874 -0.1277 -0.3874 0.0090 0.1409 -0.0881
    0.0944 0.1851 0.0239 0.1062 0.2427 0.0381 0.1876 0.0869
   -0.0961 0.0233 0.1863 -0.0182 -0.0994 0.0060 -0.0571 0.0043
    0.3551 0.1204 0.5149 -0.1627 0.0911 0.0427 0.0632 0.2219
   -0.0323 -0.1753 -0.1365 -0.0159 -0.0628 0.3788 0.0599 0.1063

How can I make a heatmap that looks like the one from Nasdaq?
http://screening.nasdaq.com/heatmaps/nasdaq-100-heatmap.aspx

I tried imagesc and heatmap, both did not work.

Thank you very much.

There's no existing function that will do all of the heatmap (and displayed info) that you want, but all of the functionality exists to write your own.

imagesc is a good place to start.

Something like

imagesc(TotalReturns)
colorbar
for idx = 1:size(Tickers,1)
   for jdx = 1:size(Tickers,2)
      text(jdx,idx,Tickers{idx,jdx},'HorizontalAlignment','Center');
   end
end

will get the initial data plotted.
From there you need to read the doc related to Handle Graphics to understand how to further manipulate the image to get it to look like you want.

Phil.