patch ob-R.el to handle output with > characters from https://orgmode.org/list/87zgxc42qg.fsf@gmail.com/

ob-R.patch

--- ob-R.el.orig	2021-09-23 09:09:47.449131259 +0800
+++ ob-R.el	2021-09-23 09:44:13.727290603 +0800
@@ -38,6 +38,8 @@
 (declare-function ess-eval-buffer "ext:ess-inf" (vis))
 (declare-function ess-wait-for-process "ext:ess-inf"
 		  (&optional proc sec-prompt wait force-redisplay))
+(declare-function ess-send-string "ext:ess-inf"
+		  (process string &optional visibly message _type))
 
 (defconst org-babel-header-args:R
   '((width		 . :any)
@@ -437,26 +439,23 @@
 	  (org-babel-import-elisp-from-file tmp-file '(16)))
 	column-names-p)))
     (output
-     (mapconcat
-      'org-babel-chomp
-      (butlast
-       (delq nil
-	     (mapcar
-	      (lambda (line) (when (> (length line) 0) line))
-	      (mapcar
-	       (lambda (line) ;; cleanup extra prompts left in output
-		 (if (string-match
-		      "^\\([>+.]\\([ ][>.+]\\)*[ ]\\)"
-		      (car (split-string line "\n")))
-		     (substring line (match-end 1))
-		   line))
-	       (with-current-buffer session
-		 (let ((comint-prompt-regexp (concat "^" comint-prompt-regexp)))
-		   (org-babel-comint-with-output (session org-babel-R-eoe-output)
-		     (insert (mapconcat 'org-babel-chomp
-					(list body org-babel-R-eoe-indicator)
-					"\n"))
-		     (inferior-ess-send-input)))))))) "\n"))))
+     (let* ((tmp-file (org-babel-temp-file "R-")))
+       (with-temp-file tmp-file
+	 (insert (concat body "\n" org-babel-R-eoe-indicator)))
+       (with-current-buffer session
+	 (let* ((process (get-buffer-process (current-buffer)))
+		(string-buffer "")
+		(comint-output-filter-functions
+		 (cons (lambda (text) (setq string-buffer
+					    (concat string-buffer text)))
+		       comint-output-filter-functions)))
+	   (ess-send-string
+	    process (format "source('%s', print.eval=TRUE)"
+			    (org-babel-process-file-name tmp-file 'noquote)))
+	   (while (not (string-match (regexp-quote org-babel-R-eoe-output)
+				     string-buffer))
+	     (accept-process-output process))
+	   (substring string-buffer 0 (match-beginning 0))))))))
 
 (defun org-babel-R-process-value-result (result column-names-p)
   "R-specific processing of return value.

This is cobbled together from https://orgmode.org/list/87zgxc42qg.fsf@gmail.com/ and works for me. (applied on org-mode 9.4.6)