GPTIPS 2, Symbolic Regression. Error

9 次查看（过去 30 天）
Luis J Gilarranz
Luis J Gilarranz 2019-2-14
评论： Luis J Gilarranz 2019-5-22
Hi,
I'm using GPTIPS 2 (https://sites.google.com/site/gptips4matlab/) to come up with a model that fits some data. The code runs, and I get the pareto front of models etc. However, I’m getting an error related to the symbolic toolbox.
For instance, when using “gpmodelreport(gp,84)” I get a screen print saying “Simplifying model ...” and then, an error
Error using gpmodel2sym (line 103)
Could not get symbolic object(s) for this model. Error using sym>convertChar (line 1459)
Character vectors and strings in the first argument can only specify a variable or number. To evaluate character vectors and strings representing symbolic expressions, use ‘str2sym’.
That error also shows up when I do “comparemodelsREC”, “gpmodel2sym”, “uniquegenes”...
Any idea?
Cheers!
LJ
  1 个评论
Luis J Gilarranz
Luis J Gilarranz 2019-2-15
I've narrowed down the error to the function gppretty.m, but substituting "sym" for "str2sym" doesn't solve the problem

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

xox ir
xox ir 2019-3-18
Hello,
please create this function:
function y=xsym(x)
if isnumeric(x)
x=num2str(x);
end
y=str2sym(x);
Then add the code below:
if~verLessThan('matlab','9.3');sym=@xsym;end
At the begaining of gppretty.m
2019-03-18_102852.jpg
  1 个评论
Luis J Gilarranz
Luis J Gilarranz 2019-5-22
Hi xox ir,
After following your instructions "gpmodelreport" works, however, when I want to use the gene browser to simplify the model I get the following error:
genes = uniquegenes(gp)
Scanning 100 models ...
Total encoded genes found: 373
Unique encoded genes found: 49
Decoding & simplifying genes...please wait.
Simplifying gene 1
Error using sym>convertChar (line 1459)
Character vectors and strings in the first
argument can only specify a variable or number. To
evaluate character vectors and strings
representing symbolic expressions, use 'str2sym'.
Error in sym>tomupad (line 1225)
S = convertChar(x);
Error in sym (line 214)
S.s = tomupad(x);
Error in uniquegenes (line 137)
symgenes{i} =
sym(genes.uniqueGenesDecoded{i});
Any idea?
Cheers,
LJ

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Common Operations 的更多信息

标签

产品


版本

R2018b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by