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## Pseudospectra of a Dense Random Matrix Dimension N=200 Pseudospectra of a random matrix whose entries are drawn from the normal distribution with mean 0 and variance 1/N. This example was first illustrated in [Tre92].

Further details about this example can be found on the page:
Pseudospectra of Random Matrices: Dense and Triangular Matrices.

Use the following MATLAB code compute a similar image using EigTool.

```   N = 200;
A = randn(N)/sqrt(N);
opts.npts = 20;
opts.ax = [-1.5 1.5 -1.5 1.5];
opts.levels = [-4:-1];
eigtool(A, opts)
```
Download this code: randense.m.
{"ft_lang_label":"__label__en","ft_lang_prob":0.73394924,"math_prob":0.90073526,"size":564,"snap":"2019-13-2019-22","text_gpt3_token_len":163,"char_repetition_ratio":0.116071425,"word_repetition_ratio":0.0,"special_character_ratio":0.28014183,"punctuation_ratio":0.19008264,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9878764,"pos_list":[0,1,2,3,4],"im_url_duplicate_count":[null,null,null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-05-24T19:39:19Z\",\"WARC-Record-ID\":\"<urn:uuid:a247889b-8734-45f6-83bf-4c74a2023e1d>\",\"Content-Length\":\"1977\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:7b13b972-dfdf-4248-9ed8-0c05ecbf6c91>\",\"WARC-Concurrent-To\":\"<urn:uuid:4eafd52f-6371-412a-87f4-b41c6eb1985a>\",\"WARC-IP-Address\":\"129.67.151.1\",\"WARC-Target-URI\":\"http://www.cs.ox.ac.uk/projects/pseudospectra/thumbnails/randense.html\",\"WARC-Payload-Digest\":\"sha1:LDKWC327YSDBAY5GE3A7RZKQI7CCXTMH\",\"WARC-Block-Digest\":\"sha1:QY3NPQ3J7U3TW3XVJPWOYWCLCICHRWZB\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-22/CC-MAIN-2019-22_segments_1558232257731.70_warc_CC-MAIN-20190524184553-20190524210553-00079.warc.gz\"}"}